It is possible that they took the mysterious unreleased TC-031 and stuck Rocman X onto that board; however (as I mentioned earlier), my latest copy seems to be an original release, definitely not one of the later releases. Because TC-030 (TBM)'s game comes before TC-031, it seems a bit illogical that they would stick an original RMX cart onto a later circuit board, as opposed to sticking it onto an extra circuit board from an earlier game.
If TC-031 was close enough to finished to be receiving imprinted circuit boards with its part number on it, it probably would have seen the light of day; if it was not far along in development, then they would have never been printing special circuit boards for it so far in advance...
[/quote]I've noticed several companies including Sachen that have had several games made/released within the same year, and it might've been that way for the later TC/SA-### games; for example a lot of the original ten Joy Van games have had a 1989 copyright on them (and some companies have had separate teams to work on all the new planned games for that year.) It may have been canceled later in development then to save on manufacturing costs had the other new (at the time) games like Rocman X put on the boards.
It's just a hunch on my part though. I have a bunch of FC Sachen stuff I should take a look at and see what's on their boards.
Checking my games, they have these on the board:
(NES games)-Reprint NES Jurassic Boy has "TC-26" (Q-Boy)
-Both of my Q-Boy games (NES reprint and FC carts) have "TC-2M-RAM-COB"
-Rockball NES has "TC-A003-72P" on it, and has an odd NES board(!) with a port and converter switch on it, pictured below:
Spoiler: click to toggle
(FC games)-Reprint of Rocman X has "SA-005" (Colorful Dragon's number) on the board.
-Boxed Poker II (original print I believe) has "SA-015" (Chess Academy)
-Hidden Chinese Chess original has "NE-001A" on both sides.
-Mahjong Companion (Hacker Copyright) with a "Padillon Gais" (Papillon Gals) label has "TC-32" (Millionaire 2/Chuugoku Taitei)
-Super Pang 2 has "TC-21A" on it, though I dunno if the "A" is part of the numbering or meant to be part of the solder points.
-Taiwan Mahjong II has
"(C) 1991 SACHEN
Model. SA-015
MADE IN TAIWAN"
on the board. Again, SA-015 is Chess Academy.
-Hell Fighter's weird; it has
"(C) 1991 SACHEN
MODEL: SA-017-VERSION B
MADE IN TAIWAN"
The released SA-017 is Locksmith, which neither that or Hell Fighter have numerous revisions (to my knowledge.) I kinda wanna say that they meant for it to be Auto Upturn (TC-017) and that Auto Upturn was meant to have one game with and without nudity in it (the nudity is certainly out of left field with that game.) Just a hunch though.
-Millionaire and Metal Fighter English reprint has
"(C) 1991 SACHEN
MODEL: SA-016-1M
MADE IN TAIWAN"
The back has "
SA-016-256" The game's numbers are actually bigger on that side. SA-016 is Hell Fighter btw.
-Pyramid original (red cart) has "TC-012 SACHEN" on it. TC-012 is World of Card Games.
-Penguin and Seal original has its proper numbering on the front (SA-002) and "3013 SACHEN" on the back.
-Taiwan 16 Mahjong reprint has "REV-A" on the front and "*Sachen logo* SA-001-1" on the back.
-Locksmith has...Uh..."SA-0036" on it. Seriously. The TC series only goes up to 32 and the SA series only go up to 27. Speculate away, I guess.
-Poker III has
"(C) 1991 SACHEN
Model. SA-15
MADE IN TAIWAN"
SA-015 is...Chess Academy again (did that thing sell that badly?) Also it has a tiny glob-top board soldered to the actual game's board. Dunno what that's about, but here it is:
Spoiler: click to toggle
-Mahjong Trap original and Incantation (Galactic Crusader) original have "SACHEN SA-002" on it. SA-002 is Penguin & Seal.
-World of Card Games' board has "TC-012 SACHEN" on it. One of the few boards that matches the game's numbering.
(Hacker releases)
-Metal Fighter Mu by Kinema Music has "聖謙 TC-04" with "聖謙" being the Chinese name for Sachen.
-Pyramid (Hacker Version, which has a cart mold similar to the original ten TC releases...Hmm.) has "SA-004" which is Lucky 777's number.
-AV Pachi Slot isn't a Sachen game, but for the hell of it I wanted to check my Hacker stuff. Like the traditional Famicom molded carts used by Sachen, the cart mold with the "wings" are held together by pegs that pop together (the square cart molds by Joy Van and certain Hacker games use tabs like the other carts.) I say all of this because the game only has "2209" on its board.
-Idol Shisen Mahjong just has "2208" on it.
(Etc.)
-Jovial Race NES reprint, and both Little Red Hood FC original prints have no numbering on their boards.
That's all I've got. The NES stuff published in the U.S. use 72-pin boards and they had nothing special on them from what I remember.
Edit: Forgot to add the images. Derp.