This is an interesting thread, thanks for posting you guys. In the late 60's early 70's I had a boutique that specialized in Canadiana in partnership with a fellow from England, he sold Mangles, I sold Wringers.
Got the latest wring going it was in rough shape, rollers were stuck and one of the tension screws was frooze bad but we got it free.
Handle was broken off and missing so had to make that also, the only word as far as brand says Protection and i cant find another like it.
Disclaimer, all material is for personal use only always consult an expert before building a boiler.