Smokinapankake

So I just would like to confirm that what I’m thinking is correct. I have a Nishiki Optima XRS, a 700c wheeled hybrid. I believe it to be a 1993 or 1994 based on component spec and various websites (know your bike and bikepedia, bicycle blue book). The frame has two serial numbers stamped on the bottom of the BB shell: F2K03288 on the drive side, and R935020176 on the non drive side. Is this a Fairley built frame, November 1992? All the Shimano date codes appear to either be 0 (or Q) and a letter, i.e., 0G (or QG) etc. If the 0 is actually a Q, then that would make better sense as the components are all Shimano 400CX or 700CX, which were only produced for a few years in the early 90’s. But the two numbers stamped into the BB shell are tripping me up. Any thoughts?

EDIT: After stumbling on T-Mar’s excellent Nishiki Serial Number Database post here on BF, I believe the R935020176 sn to be the correct serial number. That would therefore place it as a Derby manufactured frame, Kent Washington, on the 350th day of 1992, sequential production number of 0176. The component date codes would further support this as they were all manufactured sometime in 1992. But what is the other F2K number? Both numbers have factory paint down in them so were applied at the factory before painting. And I find it hard to believe the frame was made in the USA given the relatively low MSRP of $569 (according to bikepedia or bicycle blue book). But stranger things have happened, right?