Thanks for your comments. Firstly, the original tremolo and bridge pieces came in the box, but I decided not to use the trem because the Les Paul bridge would not be very kind to the strings when stretched, plus the mounting holes for the Les Paul bridge would make it impossible to put the stock bridge unit back on anyway. The stock tremolo units for these are actually quite good - some say the best feature of these guitars - and you will often see them sold as parts on ebay.
The guitar when new would have looked like this:
The Matsumoku models site and the Wiki page on Matsumoku guitars are pretty comprehensive these days.
The Ea 250 was the first model Epiphone to be imported back into the USA once Epiphone moved operations to Japan.
This is the second generation of these, made from 1972 - 75 or 76, with the single coils being modded cosmetically to look more like Gibson pups.
Pups are not super quiet, but ok in that regard - and I still have the alnicos on hand just in case. The casings for the originals are a little larger than standard so part of my internal debate will be a cosmetic one. Plan B will be a roller bridge, Kluson tuners, Bigsby vibrato and the alnicos - all gold, and on hand. I'll give it 6 months or so stock and reassess.
The most impressive thing about the guitar itself is the build quality - really tight and integrated. remembering these were still mostly hand made at this stage and the Japanese were [are] amazing when it comes to making things with wood.