Fender never replied, and the magazine showed polite disinterest.So, with my dreams of being A Published Author in shreds, I might as well make what I've got available to folks.One run of Princeton Reverb II serial numbers seems to stretch from 1984 to 1986 with just a few from 1987, yes 1987, when some 220V models were still being shipped to Sweden and the UK.So if you'd like a bit more detail on an amp in that category please get me the speaker date codes, not just the serial number. Upon arriving at Fullerton, any one of these chassis might be built as a Champ II or a Bassman 20, in a process which appears semi-random when tracked only by serial number.Compared to my estimate of the total made, that's more than one in forty.
For the batches labelled "date codes needed", I haven't got any loudspeaker or transformer date codes, or (gold dust) the 4-digit inkstamp on the metal chassis, which is usually only visible when out of the wooden cab.Subtract one from the other and I'll have a rough-cut figure for how many were made. PRII owners were kind enough to start sending their serial numbers in.I was puzzled to see how some of them were separated by over 100,000.Certainly the hundreds of people who have helped me seemed keen to know.Meanwhile I've offered this info to Fender US, Fender UK, and a US magazine.I run a couple of websites making the schematics for these amps easily accessible.As people download them, I'm hoping they'll respond to my request that they send me their amp's serial number for this project, and many do.His info (rightly without details of the amps' owners) still represents about a sixth of my database.As of November 2017 I've got info on over 1800 amps.This means that these 2 amp types can only be treated together for dates or production quantities when, as in this study, the serial number is all we have to go on.(Fender did this chassis-sharing thing in earlier years, with the same implications for guessing quantities, as noted by Greg Gagaliano.) I estimate about 5500 were made in total.