If this helps ... I bought my Record No. 4 new in the mid 70's and it is "flat". My others are about that age and are flat too.
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Now - that is a good question
I don't think Record branded castings etc. with Date of Manufacture - I need to check that out.
All I can say is I started as a apprentice Fitter & Turner in 1965 , the apprentice workshop was brand new and had Record Fitters No. 23 QR vices & they IIRC had flat ends.
The technical college I went to ISTR was built 1958 and the vices were Record mechanics , mainly 4" + a few other sizes / types and they had flat ends.
The workshops had hundreds of vices , I would say the majority of newer vices were Record steel QR vice , various sizes and they all had conical ends. Possibly conical ends continued for longer on the steel vices ?
There were quite a few Fortis vices + the oddbod ancient thing. There was a lot of vices of a particular make , I remember them well but can't remember the manufacturers name , never seen one since or even on eBay.
I would guess all these vices went back to the 1930's / 1940's.
The one I can't remember , they were good vices , steel with a top anvil surface. British Railways workshops had their own steel & CI foundry , Horwich , near Bolton Manchester , If they did them then they would be marked such as BR(E) British Railways Eastern. It could be these vices were internal shopped prior to nationalization by NER or LNER - but again they would be well marked and I don't recall a makers name on them. I sort of remember the odd vice with Osborn on - these may have been made for Henry Osborne Tools Ltd.
So - in short - I suspect the conical spindle end types date back to the 1950's & before.
There are plenty of good (as good as new) Record 34 & 84 (or sometimes marked as 34/84 ) + IIRC the latest are T84 coming up on eBay all the time. Many as good as new & they are my fav. vice , I avoid P&P so bide my time for local collection - prices paid vary from £15 (too cheap) to £40 , and even up to £80 / £100 + on high days.
Brand new 84 , 112 & 114 are Serious £ expensive - I suppose they are company purchase & it is 100% tax offset as capital machinery - if that possibility is still the case ?
