I don't think it's a 531 steel frame, but not the cheapest of the Peugeots either. The Simplex dropout implies it's a medium range frame I think.
I would date it around the 70s due to the total lack of braze ons?
Surely not 80s
I currently have a Peugeot frame with simplex dropouts that's Vitus tubing on the 3 main tubes (and presumably carbolite 103 for the rest - chromed forks have a carbolite sticker). Mine's a mid 80s, bit this frame might be a similar tube set?
I don't think it's a 531 steel frame, but not the cheapest of the Peugeots either. The Simplex dropout implies it's a medium range frame I think.
I would date it around the 70s due to the total lack of braze ons?
Surely not 80s