Bluebird Technical Discussion 1935-1937


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Freqman1

Riding a '37 Dayton Super Streamline
Jul 14, 2009
15,298
15,196
Evans, GA
#22
Thanks Bill! Looks like serial is N118578 and "B9". This would be in line with the theory the "B#" is the month as your serial precedes both of my "B10"s. V/r Shawn
 

scrubbinrims

Riding a '38 Autocycle Deluxe
Sep 2, 2010
6,434
1,384
4900 New Kent Rd, Richmond, VA 23225, USA
#26
I rub it's underbelly later.
1936 only alternate color.
Keep in mind, Sears produced models seasonally, not annual cutoffs.
As labor intensive as these are, I wouldn't be surprised if the hulls were made in batch and mated to the frames with hot lead later to fulfill order/contracted volumes (4k allegedly through the run).
Chris

redbird right.JPG


Redbird SN.JPG
 

fordmike65

Riding a '37 Colson Imperial
Mar 4, 2012
16,299
23,913
East Los
#27
I rub it's underbelly later.
1936 only alternate color.
Keep in mind, Sears produced models seasonally, not annual cutoffs.
As labor intensive as these are, I wouldn't be surprised if the hulls were made in batch and mated to the frames with hot lead later to fulfill order/contracted volumes (4k allegedly through the run).
Chris

View attachment 304952

View attachment 304953
Am I seeing 2 separate serial #'s stamped on your BB?o_O '35 & '36?
 
Likes: Robertriley

Freqman1

Riding a '37 Dayton Super Streamline
Jul 14, 2009
15,298
15,196
Evans, GA
#29
I rub it's underbelly later.
1936 only alternate color.
Keep in mind, Sears produced models seasonally, not annual cutoffs.
As labor intensive as these are, I wouldn't be surprised if the hulls were made in batch and mated to the frames with hot lead later to fulfill order/contracted volumes (4k allegedly through the run).
Chris

View attachment 304952

View attachment 304953
Thanks for posting Chris. That is pretty crazy to have both year serials on there. Does you bike have the alemite BB fittings? V/r Shawn
 

THE STIG

Cruisin' on my Bluebird
Jul 21, 2013
2,060
1,847
Waterford, NY
#30
I'm inclined to agree with Redline here. "N" indicates 1935, "A" 1936, and "B" 1937 according to Mr. Columbia's (Ken) site. This said it would appear that somewhere late '35 Westfield stopped the welds/brazing on the bottom of the tank and added the alemite fittings to the bottom bracket. Joe thinks his is a late '36 which the "B12", if indicating month, would confirm. I would like to see some bikes with lower "B" markings so we could get a feel if this is a month indicator or maybe model? V/r Shawn

minez is D10 C73"X"O6 (can't make out 3rd numb) no BB fitting, stepped seat post, early fenders, flush head tube, no brass gobs
 
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Freqman1

Riding a '37 Dayton Super Streamline
Jul 14, 2009
15,298
15,196
Evans, GA
#31
Would also like to see differences in speedos
minez is D10 C73"X"O6 (can't make out 3rd numb) no BB fitting, stepped seat post, early fenders, flush head tube, no brass gobs
Thanks Tarry but that serial does not follow any convention for what we've seen so far. Wander if maybe a late '37? V/r Shawn
 
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cyclingday

Riding a '38 Autocycle Deluxe
Feb 24, 2008
5,058
12,937
Costa Mesa, California. United States
#38
From what I can tell, I think mine is a 37 model for sure. Opalescent Blue paint, Alemite fittings, etc.
The only thing my bike has that is in the grey area between years, is that it had the dial speedometer instead of the roller type that was more typical of a 37 model.
So it may be an early 37.
I'll get some pictures of the serial number as soon as I can, and post them here.

P.S. If that patent drawing doesn't get your juices flowing, then you're in the wrong hobby.

Also, interesting to note, that a B.C. Jiffy stand is shown in the patent drawing.
 
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scrubbinrims

Riding a '38 Autocycle Deluxe
Sep 2, 2010
6,434
1,384
4900 New Kent Rd, Richmond, VA 23225, USA
#39
I find it interesting my bike has a couple of serial numbers, N131944 - 1935 and A191798 - 1936
I've always thought it was built in 1935 and released in 1936 with the new color, still do.
I wasn't expecting to see later N serial numbers without the A stamping or earlier A stamped bluebirds without the B stamping. Goes to show not everything goes in sequence...
Technically, my bike is a 1936, but SN's that year went from A5429 to A266083 according to Mr. Columbia's records, but that's quite some time sitting around between build and release.
Yes, mine has the 2 brass spots underside and alemite fittings in the crank hanger (also in the hubs).
Chris
 

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