I have an ancient Denbigh Horizontal Milling Machine, and would love to know more about it! It far pre-dates anything about Denbigh on Tony Griffith's 'Lathes' web-site.
Table size about 17" x 5" -ish. Vertical travel about 7"? (From memory – it's presently stored in bits, awaiting rebuilding so I can use it!)
3MT spindle in plain bearings.
Unusual lead-screw pitches: 6tpi on 2 of them, 8TPI on the other.
Power-feed wormwheel fitted but no drive-shaft – either lost or an option not taken by the original owners.
Built for overhead drive to 3-step flat-belt pulley – the casting forms a loop so you can't use a V-belt upwards.
Single, round-section, steel bar over-arm. The broken drop-bracket that came with it looks like some substitute from a totally different machine, not an original at all.
Bench-mounting but has its own, very heavy, one-piece cast-iron stand with integral, shallow chip-tray and large open central cavity so it vaguely resembles a Victorian loo!
No obvious model type or number, apart from the name, Staffordshire Knot trade-mark and the digit "4" stamped into some machined surfaces – possibly a batch number rather than serial number.
I have seen what I think is a variant on the same mill, with lever-action traverse the text said, in a photo on ME not long ago, but it was largely hidden by its owner's set-up to use it as a faceplate lathe for machining miniature traction-engine parts.
Small, early horizontal-mills were quite often fitted with lever feed for mass-production manufacturing by semi-skilled operators. The 6TPI threads on mine may have been to special order – I just don't know!