Would anyone have an idea as to the date of a Lauson a mate is working on: It is a disk flywheel horizontal open crank engine with lobster tail crank guard. Speed. 465, No. WP 34212, HP. 3 1/2 Thanks. Patrick M Livingstone Leichhardt NSW http://www.oldengine.org/members/pml/Index.html http://www.users.bigpond.com/pml/