Revision F (RF-1F) DR with Output Transformer code 562105, EIA606-401. Power Transformer 561136, EIA606-242. Choke is 550381, EIA606-302. And it is was made in '93, it was marked on the PCB with date of 2-11-93 along with a mark on the underside of the chassis of 3-93.
Ok, here are the links...