Well it seems the vote is clearly vintage part (around 1978). That will be my first L'Erioca legal bike. I made some contacts asking around to gather parts, and see what I can find :)
I might go for a modern saddle though ;)
My fixie (Charge Hob 2011) is 42/16...haven't been able to take it out this week due to slushy roads with surprise frost patches ;( The Thorn XTC tourer is a versatile tough beast and that's been my main ride equipped with Marathon Winters.
i ride a 70s Bike, & have a San Marco regal saddle, Tom Boonen belgian number 1 has one on his bike. They are quite expensive but, worth it! Dont spoil the look of you bike with a cheap/shit saddle. Cinelli do some beautiful suede ones, get a NOS.