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Switch collection Cherry M51-0131

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Manufacturer Cherry
Series M7
Part number M51-0131
Behaviour Linear
Signalling type Metal contact
Switch mount Plate
Keycap mount Burroughs cruciform post
In production No
Work done Yes


Acquired 9
Given away 3
Sold 1
Remaining 5
Of which broken 2


The part number is confirmed, as these were sourced from a labelled Cherry box. These are Burroughs-specific custom switches with a non-standard keystem. They take the same keycaps as the M94A-1GBR switches found across Bulgaria.

Although numerically they are placed within M5 series, these are M7 parts. The Cherry drawing for these shows a Style B switch (and seems to give the date of Style B’s introduction), but notes that the part number used to be M51-0129. It is not clear whether M51-0131 represents a revision to the original design (e.g. move from Style A to B) or whether M51-0131 indicates the redesigned version built from German tooling under Series M7.


Source Consignment Quantity Line Notes
Deskthority::Mrinterface Consignment the 9th 1 (NOS)
Deskthority::ped Consignment the 10th 2 (NOS)
Deskthority::facetsesame Consignment the 20th 5 (NOS)
Deskthority::Nuum Consignment the 54th 1 (NOS)


Destination Date Quantity Disposition
UncleFan (CN) 2017-11-17 3 Swap
Deepak Kandepet (US) 2019-09-30 1 Sale