Mike,
apologies for stealing your thread, but I am also in the process of buying a '59 SR and unlike you am unsure of the provenance of much of my tinware.
It currently has the small export tank with pear shaped badges, I thought this tank badge wasnt until 1960 but then US and UK images seem to show both small round and pear shaped badges on this year.
I also don't have a decent front guard or stays and am wondering which chrome guard is closest to the '59 SR
? Burton BB have the sports RR guard and also goldstar fronts.I believe the bike was a UK import but probably erring towards the american chrome rather than UK painted finish for the rebuild.