Interesting. That looks like about the same vintage as mine. I notice it's got the chrome fork. The handle bars don't look OEM. And it looks like a fixie to me. Original paint job and decals, I think. Nice looking bike. I don't know about the vintage, but maybe somebody somewhere can match serial numbers up to production years. Looks like somebody upgraded the BB, too. Viscounts were built with sealed bearings in the BB and hubs.