SANYO MRS-001 NO. 66300189
have a nice weekend peoples!
There's, besides for the fun of it, probably not much use. But maybe, if there's enough serials, some person sees the bigger picture behind them. For example, the Philips Music Modules (NMS 1205) have a serial that starts with HK and on the module it's printed that it's made in Hong Kong. The Philips computers have a serial that starts with FF... Very curious.
Some other manufacturers seem to have an ongoing serial number, look at Sony, where I kinda get the feeling that whatever machine passed through the final stage of assembly got the next free serial... But to make sure, we need more... It might be wiki material if the code is broken 
Just a little suggestion: add photos of the actual hardware to the serials. Nowadays many MSX computers are looking somewhat different compared to when they left the factory more than 20 years ago 
