oops- was concentrating more on the dating based on the rear hanger pic than thinking about the model-not that it matters much since i completely missed the front braze-on SR derailleur in the first pic(1980/81 would have been the earliest for the braze-on feature to appear)-Anyway,... iirc Record Special/Record Equipe was what the top end SL frameset was called at the time.

how long did pinarello continue using the campy portacatena dropout after being phased out?


addendum- going back to the components and assuming the derailleurs,etc are original as the OP stated, that SR black armed front is of 1982 or later vintage. However the shift levers are of the more elaborate record style which was phased out earlier that same year.When the revised lever was introduced I recall that most diehard campyheads seemed to think the newer style was either ugly or at least a step backward aesthetically and the remaining inventories of the old style were snatched up very quickly. Also, It's very conceivable that the portacatena rear hangers were stockpiled by pinarello and used for some time after their discontinuation. Based on these details, I'm going to revise my year of manufacture estimate to 1983 but probably not much later than that.