Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

    Thanks very much Jim, I had never seen this or any other Boucher engine catalog references. Mine are both the D81 model, having 2 inch flywheels. I measured the bore diameter precisely on one and it was 15/16ths, I guess they just rounded that up to one inch! Also, I did not know that these engines were made much past 1910, obviously whatever information I had was wrong. And this catalog page confirms that they were also made in kit form, both machined and casting kits. Great reference!