Why do we think the 200As were first produced in 1972? Are we sure they aren't initially from 1974? or very late in 1973?
The easy answer would be a production date stamped on the instruments themselves. Preferably on the amp section, as that what makes it an "A".
It suddenly occurs to me that I see no schematics (or notes) related to the 200A line that are dated prior to October 15, 1974 (and the only one with a date is a schematic for a 207A/207VA, page 70 in my manual).
There are schematics for the non-"A" series as late as June 1, 1973--actually, there are 6, including a 200/203/214 printed circuitboard, p. 45 in my manual.
Of course, it is possible that they were still updating schematics for the pre-A 200 series long after the 200A series were well into production. (Much as there is a revised 140B amp schematic from March 1, 1974!!)
I'd just love some sort of confirmation here. Is it possible that we all just keep recycling some half-remembered, vague dates, over and over? My own 200A has no obvious date on it. My own experience is limited compared to that of some of you, and I wasn't paying attention to such evidence before, anyway.
A 1972 date on a vibrato pot or capacitor is not sufficient evidence.
