>R-Type
>Release Date: May 15, 1987
That's before the release of the Seimitsu LS-25 (precursor to the LS-32) and the Sanwa JLW.
I would say it was a Seimitsu LS-9.
The LS-9 is a similar lever to later Seimitsu designs, but the guide is placed under the microswitches instead of over, and there is no sub-guide. It had a longer lever shaft than later designs, which would have given it a longer throw. The balltop would have been smaller, about 28mm or 30mm.
The buttons of the time period were 24mm in diameter but used microswitches instead of keyswitches (like a western happ-style button). The activation force was high, probably around 50 grams, with a deep stroke length. It could also have been an Omron style of switch, which is more like a non-gaming momentary pushbutton.
Note the LS-9 uses a short-hinge switch, which is more similar to consumer arcade sticks released for consoles through the 90s and 2000s than the long-hinge versions used in arcades in the same time period.
Or it could have been a Sanwa JL-B, or an Omron FX-1 lever. Both are long-hinge designs with long shafts.
These parts are all considered old junk, and are inexpensive on ebay and yahoo auctions japan.
>>12161815
R-Type came out before the Madonna cabinets.
