Very nice.
Good to see someone else doesn't like the vertical stripe!

I'd say it's an after-market conversion of a Semco, by someone who doesn't like Uniselectors.
It seems to have no provision for operating the 'dialled number' indicator.

Goldings of Essex, perhaps?

The Jezzard 'Mini Cascade' needs to be around £400.
As the Raven says, "Nevermore".

Mayfield is the usual one.
Sometimes has a ten-stop mech from an early Mills, sometimes a more appropriate 20-stop.

Fortune reels.
Just another way of distracting attention from the gambling aspect...

I have the two smaller types, 'Lolly Dolly' and 'Extra Stout'.

I'm working on my Aristo Grosvenor Electronic again, and it's a nightmare.
You simply can't see if anything is working. There's some sort of guitar-pickup thing to count the coins out of the hopper; no moving parts.
I'll be sticking to all-mechanical or electro-mechanical from now on.

I can only see one 'missing' item on the front panel, and it suggests the coin entry.

There must be more to this...

What does the multi-way electrical connection do?
I don't like the look of that. Not one bit!