Definitely NOT Fuji S10-S, wrong lugs, seat cluster detail etc. Probably 1970s because it is 120mm spacing and clearly made for 27" wheels, single headbadge hole may be clue to brand, look for serial number under BB but if you take it to C&V looking like that be prepared to get skewered.

A pump mount peg is a hook usually on the downtube to hold an oldfashioned tire pump. There are actually 2 of them to hold the pump at both ends.