i find myself being the proud owner of a yamaha ma50 with no registration or paperwork but what i think is a very early one as the frame number is 000174 can anybody help ?

try this

http://selleckwaterfallsandwich.tumblr.com/post/343399016/the-official-selleck-waterfall-sandwich-theme-song

sure we can help :

step 1 : introduce yourself first

step 2 : let us know what you have done to try and find the answer for yourself. Google is a wonderful tool make it your friend

step 3 : search these forums for an answer, I bet it's there some where

step 4 : after you done the above feel free to ask us again