Jan 15, 2010  I have the serial numbers on the speakers and, from what I’ve been able to gather, they look to be from around the same time as the amp (1965). Unfortunately the pics do not really include the cone (so I can’t see any stamp on the cone). The frames are gray with yellow JBL on the driver. Browning auto 5 20 gauge serial numbers. Serials are 117xx and 120xx (where “xx” is a number).

I'm sure one of this site's 'elders' will take a stab at it.I guess that's me. I'm an elder. As I recall, George Martin (Jim Lansing's brother) was in charge of keeping track of serial numbers (on Fletcher Drive, and on Casitas Avenue). He entered all the serial numbers he had used each day in a small book he kept at his workbench. I believe that book got destroyed in a fire. That was the only record of which serial number was used - and when. The only other possible source might be the nameplate company (was it Nelson Nameplate?) who might still have some records as to serial number batches they made during a period.

I think we ordered about 3 or 4 months worth at a time.

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