Haven't bought a vise in a few years, then my white whale turned up :) Won't get a chance to look at it properly till this evening.
(The swivel base is back to front )
Vice handles (at least on Record vices) are designed to bend before the vice explodes, they are described as a fusible link in some of the older adverts. They bend very easily with a cheater bar on them.
I too have one of those ... yours is much cleaner than mine and I'm ashamed to say I have yet to clean it up even though I have had it quite a few months.
I believe someone on this forum (perhaps VA Grouseman) did come up with a name for the manufacturer but I have embarrassingly forgotten it...
DIF: If you want to heat and beat on a vise then use a Blacksmiths vise, that's what they were built for. They will bend and not break, when they bend chuck 'em on the forge till they are red and bend 'em back again and everyone is happy. There is a vise for every job out there ;)
The Handy and Perfect Vises are ranges that were designed and made by Parkinson as opposed to being part of a buy out.
Samsonia was the brand name that Parkinson sold their cast steel (as opposed to cast iron) vises under, I don't believe it was part of a buy out just a sub brand.
The Parkinson...
They look to be my handy work :)
If you go to the link in my signature you will find PDF's with better quality versions of those pages as well as them throughout the different years. Those are from a Buck and Hickman catalogue, there are also Record and Parkinson catalogues on that link...