[Radio Wrangler]

I have one similar, but not exactly the same.

All-yellow tuning scales in the left hand window.
Engraved panel (copper plated under the paint)
Big antenna connector.
UK modification label on the outside of the panel/chassis reinforcement gusset (You have to slide the set out of the case to see if yours has one. Mine gives the date of modification and says R1556)
Bakelite 2-pole AGC connector mounted sideways facing on rear chassis drop (Not there in your photo. Used for diversity coupling.)
PVC wiring harness (Seems to have been fitted at time of modification in the early fifties)
Genuine RCA illuminated S-meter.
Same tuning ranges as the AR88D
Just has numbers around the range knob (Later sets had tuning ranges in Mc/s)
Extra holes in front panel (for second phones jack, sometimes toggle mains switch)

It looks like you have an original AR88, no suffix. It's had some forces mods, but not all the known ones.

Slide it out of the case and see if there's a label.

Nice speaker!

David