Jeff thank you for your response. If the timers were sold in a pair would they each have there individual back plate, a one piece larger back plate to fit 2 or 3 on and are the numbers on the back plates unique to each one produced like a serial number or is it a common number found on multiple back plates you have seen.

thank you again

Jon

: For most of the models of the dashboard timers, the serial
: numbers are on the cases, just above eleven o'clock (55 minutes)
: . . . as shown below.

: They were sold on the back-plates, usually singles (square),
: sometimes doubles (rectangular); there were even back-plates for
: three or four of the timepieces (but these must have been
: special order pieces). The numbers on the back of the
: back-plates are some sort of reference number.

: Thanks for posting your message!!

: Jeff

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