Hi all, a while back I posted for help identifying a Petter's engine (see here for info and photos). http://www.internalfire.com/modules.php ... pic&t=1757 Anyway, despite lots of great advice and extensive searching, we have never been able to find an engine number (its not on the crankshaft flywheel, etc.). Recently we had a visitor and when he saw the engine, he claimed that this was a very very early engine, one of only a few prototypes Petter produced and thus it never received an engine number. Can anyone help verify this claim ? Or does anyone have more details about Petter producing a small series of prototypes ? Thanks for all your help, /Mike B.