Sorry if this is the wrong place, but the TT members do seem to be very knowledgeable about the '60s scene!
I've got two of the 5 speed Hewland/Wooler gearboxes and I've dug them out today having not looked at them in years. One has a magnesium casing and no remote and the selectors look much like those that occasionally appear on these and other pages. You have to lift the gearlever for first and reverse.
The other is in a 2821E cast iron casing and has a completely different selector arrangement. Although all the gears select when I move the rods, I can't work out how to get first and reverse using the gearlever. Anyway, both are helical, face dog boxes and are clearly related.
According to the guy I bought the mangesium cased box from, some 15 or more years ago, it came from a Broadspeed Anglia in Ireland. The iron cased box didn't have a back story. My guess is that the mag cased box is a Hewland and the iron cased one is a Wooler for the Cortina/Elan/Seven market.
Anyone have any thoughts?