I've restored one (in fact, I think it's the one in the photo above) and I stripped it because it had been painted appallingly badly in Ronseal. Then I varnished it and it looked a lot better, although you should bear in mind that the cabinets are made of plywood which isn't particularly attractive.
As you have several, I would suggest stripping and varnishing one of them to see what you think, I personally would be tempted to leave them "as is" unless the paintwork is particularly bad.
It amazes me that a machine which principally relies on a rubber suction cap for its operation still works perfectly after some 30-40 years.
As you have several, I would suggest stripping and varnishing one of them to see what you think, I personally would be tempted to leave them "as is" unless the paintwork is particularly bad.
It amazes me that a machine which principally relies on a rubber suction cap for its operation still works perfectly after some 30-40 years.
... the TESTO reaction tester originates from Sweden, being the invention of Klaus Johannes Ylinen, a Finnish Subject of Frejgatan, 13 Stockholm, (as per 
