Vintage MSR GK or XGKII in pretty good shape. 

 Believe these were only made from 1981-1984, before they raised the cook-surface support-wires up away from the burner (resulting in longer boil times). 

UNTESTED-I do not have the original yellow pump assembly!

Date code on alignment block suggests 1981

MAKE AN OFFER If this Is Important To You!

https://classiccampstoves.com/threads/msr-xgk-ii-1981-1994.20654/

https://classiccampstoves.com/threads/msr-gk-september-1977-october-1981.20613/