I recently bought what I believe to be a 1968 or a 1969 SG Jr. The pots read 1376850 which line up for a ‘68. However the serial number comes back to a ‘69. It reads 809706. My biggest issue is the serial number is ink stamped. I thought starting in early 60’s all of the solid body got the indentated serial numbers? The control cavity also has a brass plate inside that matches that of a late ‘69 early ‘70 SG. Everything leads to it being a ‘69.With pots made in the 50th week of ‘68 it’s very possible they just got used in ‘69. However my main concern is the ink stamp serial number. Any help is appreciated!