[Drew]

Follow up question on Model 90 chassis serial numbers and the number of each version produced - After lookig at Chuck Schwark's graph, early 90's had numbers below 237,001, middle versions 237,001 to
253, 099 and late versions 253,100 or higher.

Does this mean that there would be about 16,000 total middle versions made (determined by subtracting the lower figure from the higher figure given)

Can this method be used if you had a substantial log of serial numbers, taking note of the highest numbers and lowest numbers ?

I did this myself with the KLH Model 8 radio - logging about 200 serial numbers and taking note of any production changes. No number high then 11,667 was found, so I determined that about 12,000 had been produced. KLH serial numbers were consecutive, starting with 00001 and progressing to 00002, 00003, etc.

I see that Philco's numbering is more complicated. I'm just very interested in finding total production for early, middle and late versions the Model 90.

Sorry if I missed any details mentioned above by other members, serial number deciphering gets confusing.

Drew