Mitsumi standard mechanical type 1

[juspek]

Have you already checked this one in ebay: https://www.ebay.com/itm/APPLE-MACINTOS ... SwZQ1fBNXB

[Jesseg]

Not 100% related, but these switches are massively underrated, the ones I have are very smooth and comparable to FLS, so nice. good luck!

[juspek]

Glad to help, looks like that seller has lots of Macintosh HW for sale. Also got same keyboard some time ago and was surprised how nice those switches are, now just need to make a converter to actually be able to use it with PC.