An Irvine 72 two stroke engine with factory silencer and OS 905 aluminium engine mount included.
Engine is in excellent condition externally and I would assume hasn't done a lot of running. It has plenty of compression and the bearings turn smoothly. Unfortunately it is missing the prop nut & washer as well as the two M4x40 silencer mounting cap head bolts. As a plus, the Irvine 72 has the same mounting bolt pattern as an OS FS-91S2 (4mm bolts with 25mmx52mm centres)
I'm not certain of it's age, but the parts listing is dated 4/8/93. (Part of a deceased estate.)