Can anyone identify these spark plug sockets?

[normspanners]

Yeah I had an old forklift tc3 and when I say old it was old when I got it, and that was 36 yrs ago!! that had a 4203 it would stand for mths at a time till I needed it and it would always start that is if the phosphor bronze starter pinion teeth stayed on!! saw some abuse here at the house whilst renovating, and helping building my workshop.
only scrapped it a few years ago when scrap was a fortune at over £100 a ton ish she weighed over 5 ton

 

[Pete.]

I remember when I was a lad having to hold a burning newspaper at the inlet of an old fork truck my dad had to get it going in winter.