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Shelby-badged Serial Numbers-Prewar

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Nice JJ....very good. So check out another one close to yours that I have on file. Two in a row very close. That is one sweet Shelby badge.
1309265

1309266
 
I am beginning to see something very interesting. Can't say straight away and am probably wrong, but I see a similarity in terms of one of the numbers frame to frame that seems to be emerging, whether it is a frame with 5 or 6 numbers with the preceding letter.
I have mentioned before that some have one letter and 5 numbers and some have the letter with 6 numbers..."B" through "H" are 5 number frames. "K"-"V" and on have 6 numbers, but this is not what I am looking at. This is very telling for sure...
More frames please..
 
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@SKPC thanks for posting the 30+ sernos, on that other thread.
From looking at the partial list so far, I have a few observations, and guesses.
1) For the most part it looks like the 6-digit sequence numbers pre-date the 5-digit sequence numbers, however, not including some of the oldest (low-digit) 28" Shelby bikes;
2) For the 6-digit sequence numbers, as the prefix letters increase, so do the sequence numbers; (e.g., K's look to be 100,000 series, and M's look to be 200,000 series).
3) The list does not have any 5-digit sequence numbers with the "D" or "E" prefixes, perhaps those were during the war, or just not yet reported(?).
4) It seems that more prefix letters are observed than there are years to account for, indicating perhaps some overlap, or more than one letter used in a single year, not a 1:1 correlation; (maybe suggesting spring-summer & fall-winter sequences?).
5) Looks like Shelby did skip some letters: O, Q, I, J, and maybe L?
Perhaps Ken Swank's 1997 list might be amended, and used for any parts that might work (post-war?). We have seen a few "G" serial numbers lately, maybe Ken S. got that one right, at 1945-G(?).
Perhaps the earlier 1930's numbers (6-digits) still need more data collection & analysis.
 
Here is the rest of my list so far.
NumberFrame Style
B23269Double curved top offset
B32475Double curved top offset
B54077Y-Double Toptube Streamline.
B54536Y-double toptube streamline
B75453Double Curved Top Offset
B78093Y-Double Toptube Streamline
B83352Y-Double Toptube Teardrop
C04480Ladies 28-er
C48413Double curved offset
C84994Y-Double Toptube teardrop
C89161Double curved top offset
C89183Double curved top offset
C89493Y-double toptube offset
F24298Double curved top offset
G93335Moto
G70964Double curved top offset
G72001Double curved top offset
G93335Moto 28-r
H111411Moto
K139826Roadster single bar
K173446Moto Small Tank
K192390Y-double toptube streamline
M221295Y-double toptue streamline
M224861Y-double toptube streamline
M231261Y-double toptube streamline
M239035Moto Small Tank
M260211Roaster single bar(mark)
M267387Moto Big Tank
M?????Y-double toptube streamline
N305981Y-double toptube streamline
N391253Y-double toptube streamline
N56890?Y-double toptube streamline
N318396Y-double toptube streamline
N328362Y-double toptube streamline
N341008Y-double toptube streamline
N344857Y-double toptube streamline
N386678Y-double toptube streamline
N387816Y-double toptube streamline
N391253Y-double toptube streamline
N404666Y-double toptube streamline
N442811Y-double toptube streamline
P483404Y-double toptube streamline
P540511Y-double toptube streamline
P548826Y-double toptube streamline
P477561Double toptube streamline
P483404Y-double toptube streamline
P486833Double toptube streamline
P488776Double toptube streamline
P549490Double toptube streamline
P711841Double toptube offset
P472104Double toptube streamline
P98765typical Straightbar
R586328Double toptube streamline
R619323Y-double toptube streamline
T699707Typical straightbar
T723799Typical straightbar
T735857Double curved top offset
V11035Y-Double Toptube Teardrop
V764903Double curved top offset
V779831Y-double curved toptube offset
V820397Y-double curved toptube offset

This one below is an anomaly...strange with short number in the P series.. There are a few here and there with strange numbers.
1327071


1327072

Ken Swank decipherment work below.
1327070
 
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Latest list updated.
1930 – 1939 Great Depression. In the years leading up to World War II, the Shelby Cycle Company grew steadily with several plant expansions in 1930, 1935, 1938, 1941.

1935 Expanded to 180,000 square feet, 250 employed, making 500 bikes a day..
NumberFrame Style
B23269Double curved top offset
B32475Double curved top offset
B40864Y-double toptube teardrop
B51219Y-double curved offset
B54077Y-Double Toptube streamline.
B54536Y-double toptube streamline
B54726WomensBigTank
B59577Y-double toptube streamlineBT
B67339Y-double toptube streamlineBT
B75453Double Curved Top Offset
B78093Y-Double Toptube streamline
B83247 5Double curved top offset
B83305 2Y-Double Toptube Teardrop
B85077 0Double curved top offset
C04480Ladies 28-er
C46413Double toptube offset
C84994Y-Double Toptube teardrop
C89161Double curved top offset
C89103Double curved top offset
C89493Y-double toptube seat
F24298Double curved top offset
G93335Moto
G70964Double curved top offset
G72001Double curved top offset
G93335Moto 28-r small tank
H111411Moto small tank
J82606Ladies stepthrough no tank
K31097Ladies step through
K139826Roadster single bar
K173446Moto Small Tank
K192390Y-double toptube streamline
M217364Moto Big Tank
M221295Y-double toptue streamline
M224861Y-double toptube streamline
M231261Y-double toptube streamline
M239035Moto Small Tank
M260211Roaster single bar(mark)
M267387Moto Big Tank
M?????Y-double toptube streamline
N305981Y-double toptube streamline
N391253Y-double toptube streamline
N56890?Y-double toptube streamline
N318396Y-double toptube streamline
N328362Y-double toptube streamline
N341008Y-double toptube streamline
N344857Y-double toptube streamline
N386678Y-double toptube streamline
N387816Y-double toptube streamline
N391253Y-double toptube streamline
N404666Y-double toptube streamline
N435540Y-double toptube streamlineBanana
N442811Y-double toptube streamline
P483404Y-double toptube streamline
P540511Y-double toptube streamline
P458826Y-double toptube streamline
P477561Double toptube streamline
P483404Y-double toptube streamline
P486833Double toptube streamline
P488776Double toptube streamline
P54041Double toptube streamline
P711841Double toptube offset
P472104Double toptube streamline
P98765Straightbar
R586328Double toptube streamline
R594872Double toptube streamlineBT
R596090Y-double toptube streamlineBT
R614690Y-double toptube streamlineBT
R619323Y-double toptube streamline
R649961Y-double toptube streamline
T698303Womens BigTank
T699707Typical straightbar
T727608Womens BigTank
T723799Typical straightbar
T724196Y-double toptube stremlinebBT
T735857Double curved top offset
V11035Y-Double Toptube Teardrop
V764903Double curved top offset
V779831Y-double curved toptube offset
V820397Y-double curved toptube offset
 
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