OK - now for something completely different....
This is my very late Anni PSU.. PSU serial number is #3797 but the deck doesn't have a serial number. I bought it from a dealer in Cambridge and it was their demo deck for many years so possibly was purchased direct from PT back in the day (maybe the PSU case design didn't see the light of day?). The deck has an unusual brushed steel champagne top plate and is in stained mahogany.
It used to have 4x 3.6V battery packs connected in series to make 14.4V. Each pack is just 3 x 1.2V AA Ni-Cads, again soldered in series. Maplin had an offer for 12 1.2V AA rechargables so I soldered them together as one lump to replace the duff originals.. Not sure it quite works though as the battery light only comes on for a few seconds after switching off from the mains. Could be another problem perhaps. The PSU itself works though, just not sure about battery power. I think it's supposed to switch automatically so perhaps the battery voltage sensing circuit isn't right.
As you can see, it is unusual! Based on the then current PT CD player design, using the same buttons as the Numeral/Litaural. the case is all metal with a thick alluminium top panel.
The deck uses a Premotec motor like Funk Firm so I think it must use some kind of current feedback. I wonder if it is the same as the K-Drive. I have seen another Anni using the Premotec motor, for sale a couple of years ago but with a standard PSU box - maybe the later ones were all current feedback.
I'm guessing it could be a John West design as he did stuff for them around the time.