Yes Cherry ones, available freely without the 'cheat' position so very odd, unless changed.
You could fit them to certain plastic cased Scannys too to add case to wall tamper, there is a cutout in the rear of the case, sometimes the switch part number is stamped into the plastic IIRC
I agree - previously had to apply silicon sealant around rear of box and where cable enters (picture) as water did run along this. The last two times the water has capillaried from the bottom edge into the bottom of the electronics board. I have added more sealant today (picture).
Just wanted to thank all respondents for the info on this. I have ordered a new Texecom Odyssey 4 to replace this with.