Acorn BBC Micro Model A

This is an early "Issue 2" BBC Micro Model A that has been upgraded at some point to full Model B specification. The easiest way to tell that a Model B was previously a Model A machine is simply to take a look at the solder side of the motherboard paying particular attention to the where the connectors are soldered onto the board. The difference between hand soldered and machine soldered components is quite obvious.

Acorn BBC Micro Model A upgraded to Model B specifications

The Issue 2 motherboard of the BBC Microcomputer is significantly different to the later Issue 4 and Issue 7 motherboards and provi