Thanks to all for answers, much obliged
[MENTION=84826]randyjawa[/MENTION] - I can't see any difference, apart from the obvious cosmetic appearance and fact that jockey wheels on your rear derailleur seem not original? Everything moves freely and nicely, not exhibiting any worn pivots either.
[MENTION=512318]oneclick[/MENTION] - yes there is a slot in the cable housing stop.
[MENTION=333224]juvela[/MENTION] - sorry what do you mean by that? Any value indication?

Seat post wise I agree with the comment it looks very much belonging to Sunday, fair weather permitting bike indeed. It is i believe Record, not SR as you can still see World logo?