Minor differences in two model B's.

[eric1959]

Hi, I just picked up a second Model M100B and had a couple questions, nothing super important, just curious.

It has a four digit serial number, in the 8400 range, which I would guess makes it an early production model, however there seems to be a date stamped on the rear of 3/6/51 which seems like it would be a later unit if they started building them in 1950.

The noted differences between my two machines (machine #1 missing serial tag) are machine #1, wood coin box, machine #2, metal coin box. Mach #1,  scan stop switches mounted in perforated metal divider facing backwards, Mach#2, switches mounted on left mechanism bracket facing forward. Mach #1, rear of mech brackets mounted to top of shelf, Mach #2, mech brackets mounted to rear of cross brace. 

Is there any information on when these changes were made? 

Thank you!

Attachments:

[Ron Rich]

Hi Eric,
They made several "production changes" to the model B's-- I have no data on what was ,when, other then the notes, thru-out the service manual.
Ron Rich

[eric1959]

Thank you Ron, not a big deal, just kind of curious.
One other thing different I found was the record rack, it's much bulkier than usual, like a full cage instead of the more S shaped dividers on my other B, the C also has the S style so I would guess this is an early version and they quickly figured out they didn't need to be so stout and heavy.

[Ron Rich]

Hi Eric,
I am un-aware of any differences in the record rack--I have a pretty early version of the B, in commercial service still-- Are the record rack alignments ("adjustments") the same as shown in the manual ? Ron Rich