Just bought them as a punt.
Total bargain on ebay- I would buy these in a heartbeat if I was anywhere nearby- better than the 104 or 104ab.
https://www.ebay.co.uk/itm/18578634...d=link&campid=5338728743&toolid=20001&mkevt=1
They look a bit like the Cambridge R40 with the grills removed.
Cambridge R40 and the taller R50 are both classic "Transmission Line"
loudspeakers, fyi.
I know- I have a pair of R50 that I cannot sell, because no-one anywhere near me wants to buy them...
Vintage speakers ?
Try a pair of Dynaco A25s.