Sheridan Blue Streak Serial Number Location [UPD]
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In 1991 Crosman Corporation acquired Benjamin and Sheridan. In 1992 the manufacturing facility was moved to the East Bloomfield plant in Upstate New York. In the same year Crosman instituted the serial numbering procedure which included a date of manufacture as part of the serial number. Prior to 1975 you are not able to determine the date of manufacture by the serial number. Prior to 1992 we have information that, while missing some years, may be helpful to you in determining the age of your gun.
If your gun was manufactured in or after the year 1992 then the first 3 or 4 digits of the serial number will allow you to determine when your gun was manufactured. If the first 3 or 4 digits of your serial number are 1294 or D94, then your gun was made in December of 1994. The charts below will help you determine when your product was manufactured.
March 1, 1964 to April 9, 1972 Serial numbers were in the form of a letter for the month followed by the year of production in reverse, ie: C6691 would by March 1966, B2791 would be February, 1972. The below serial numbers were applied in numerical order regardless which model was being produced.
The C9 had a soldered valve and was made in Racine, Wisconsin until May, 1995. After that it became the C9A and was produced in NY and the serial numbering process follows the one used by Crosman. In June, 1997 a new trigger unit was introduced. Additional changes have taken place occasionally over time but the serial numbering process still followed the Crosman method. The Sheridan line was marketed under the Benjamin name for a short period of time and for a while during the late 1990s then under the Benjamn/Sheridan name, then marketing switched back to the Sheridan brand. The .20 caliber air rifle known as the Sheridan was discontinured at the end of 2019. All .20 caliber pellets were discontinued in June of 2021.
That was a interesting story,thank you,I like reading about the older guns and the history of the blue streaks!I currently shoot a newer blue streak and love how they perform!I like mine cuz there great road huntin guns and can easily fly out the window to deal with crows,starlings,and of course rabbits and tree rats!
In reading you article ,it got me wondering just how old my Sheridan was.As far as I can tell theres no serial number and looks similar to the picture you posted.It has the two roll pin forarm,thumb safety,front site profile,and ball end bolt ,but mine is shaped downwards.Any help determining its age would be appreciated.Thanks, Steve
I have LEE MAJORS (Six Million Dollar Man & Fall Guy)old (by checkin gun it has no numbers and push f/s bottom both side for safety) blue streak from 1963? has LEE MAJORS carved on walnut stock!light rust on sight and trigger..walnut stock read nice used condition and has NO splits or cracks! pump weak! Gun was given to me by Lee when he moved from Malibu Ca. to Florida in early 1990's. It is for sale please make a offer! CONTACT: Jori91311@yahoo.com and i will send pictures. Thanx!
hello,i have had my blue streak now for 34 years and it still shoots great , i got this gun new in 1976 when i was 12 years old ,me and my brother got one for X-mas ..puttin oil on it now ,was told when storing for a long time to pump one shot of air in the gun for storage and one drop oil on the pump plunger ,,it seems to have worked good for me ,good luck
Dating a Vintage Sheridan Model C (Streak) 1949 - 1976(be aware that changes often cannot be pinpointed exactly, so most changes will only be list by year they first appeared) Date stamps on 1964 to 1971 and serial numbers on 1972- 1985 easily pinpoint manufacture dates for these years. This change chronology is most useful for identifying approximate manufacture dates for Model C "Streaks" produced from 1949 to 1963, the "Thumb Safety" version of the Model C Streaks.
The apurinic/apyrimidinic (AP) endonuclease Apn1 from Saccharomyces cerevisiae is a key enzyme involved in the base excision repair (BER) at the cleavage stage of abasic sites (AP sites) in DNA. The crystal structure of Apn1 from S. cerevisiae is unresolved. Based on its high amino acid homology to Escherichia coli Endo IV, His-83 is believed to coordinate one of three Zn2+ ions in Apn1's active site similar to His-69 in Endo IV. Substituting His-83 with Ala is proposed to decrease the AP endonuclease activity of Apn1 owing to weak coordination of Zn2+ ions involved in enzymatic catalysis. The kinetics of recognition, binding, and incision of DNA substrates with the H83A Apn1 mutant was investigated. The stopped-flow method detecting fluorescence intensity changes of 2-aminopurine (2-aPu) was used to monitor the conformational dynamics of DNA at pre-steady-state conditions. We found substituting His-83 with Ala influenced catalytic complex formation and further incision of the damaged DNA strand. The H83A Apn1 catalysis depends not only on the location of the mismatch relative to the abasic site in DNA, but also on the nature of damage. We consider His-83 properly coordinates the active site Zn2+ ion playing a crucial role in catalytic incision stage. Our data prove suppressed enzymatic activity of H83A Apn1 results from the reduced number of active site Zn2+ ions. Our study provides insights into mechanistic specialty of AP site repair by yeast AP endonuclease Apn1 of Endo IV family, which members are not found in mammals, but are present in many microorganisms. The results will provide useful guidelines for design of new anti-fungal and anti-malarial agents. Copyright © 2015 Elsevier B.V. All rights reserved.
We conducted an analog sampling expedition under simulated mission constraints to areas dominated by basaltic tephra of the Eldfell and Fimmvörðuháls lava fields (Iceland). Sites were selected to be "homogeneous" at a coarse remote sensing resolution (10-100 m) in apparent color, morphology, moisture, and grain size, with best-effort realism in numbers of locations and replicates. Three different biomarker assays (counting of nucleic-acid-stained cells via fluorescent microscopy, a luciferin/luciferase assay for adenosine triphosphate, and quantitative polymerase chain reaction (qPCR) to detect DNA associated with bacteria, archaea, and fungi) were characterized at four nested spatial scales (1 m, 10 m, 100 m, and >1 km) by using five common metrics for sample site representativeness (sample mean variance, group F tests, pairwise t tests, and the distribution-free rank sum H and u tests). Correlations between all assays were characterized with Spearman's rank test. The bioluminescence assay showed the most variance across the sites, followed by qPCR for bacterial and archaeal DNA; these results could not be considered representative at the finest resolution tested (1 m). Cell concentration and fungal DNA also had significant local variation, but they were homogeneous over scales of >1 km. These results show that the selection of life detection assays and the number, distribution, and location of sampling sites in a low biomass environment with limited a priori characterization can yield both contrasting and complementary results, and that their interdependence must be given due consideration to maximize science return in future biomarker sampling expeditions.
Austrian Space Forum: The Austrian Space Forum (OeWF, Österreichisches Weltraum Forum) is a non-profit, citizen-science organization of aerospace specialists and enthusiasts. One of its specialisations is Mars analog research. Analog studies and analog instrument validation supported all planetary surface missions so far  and are considered as an effective tool to prepare for future missions to Mars [2,3,4,5,6,7]. Since 2006, OeWF has conducted 11 Mars analog field campaigns in diverse locations that represented: 1) average current Mars conditions (the Mars Desert Research Station (MDRS) in Utah in 2006  and the Northern Sahara near Erfoud, Morocco in 2013 ); 2) the early and wet Mars (analog site of Rio Tinto Spain in 2011 ); and 3) subsurface exploration (Dachstein Ice Caves in 2012). During these campaigns, 68 experiments and major engineering tests were performed, whichwere mostly focused on astrobiology, robotics, human factors, geoscience and spacesuit operations. Major assets of OeWF include two advanced spacesuit simulators Aouda , an increasingly evolving Mission Support Center, a dedicated Remote Science Support team , and a growing set of Standard Operating Procedures defining major workflows within a mission team. The spacesuit simulators were operated by a total of 18 analog astronauts, who were selected and trained during a >6 month program. Total EVA time is nearly 600 hours, leading to a significant experience in analog field simulations. AMADEE-15: The mission took place between August 2nd and 14th 2015 at the Kaunertal Glacier in Tyrol, Austria. This glacier was selected as a study site because of its accessibility and high number of micro-landscapes analogous to those expected on Mars in locations where abundant water ice is present. As such it is considered a first-tier Mars analog . The Base station was located at N 46.86320, E 10.71401 at 2800 masl, the highest reached location was on elevation of 2887 m. Eleven
Electrical apparatus is described, particularly useful in telemetry work, for converting analog signals into electrical pulses and recording them. An electronic editor commands the taking of signal readings at a frequency which varies according to linearity of the analog signal being converted. Readings of information signals are recorded, along with time base readings and serial numbering, if desired, on magnetic tape and the latter may be used to operate a computer or the like. Magnetic tape data may be transferred to punched cards. 2b1af7f3a8