Very nice, Charlie!
The brass tag 35 with the small hub cast iron flywheel is quite rare by my observations. Seeing yours today, I have only ever seen four of these engines, but only two with the wider flywheel rim like yours. The other two have a narrow rim like the diecast flywheel.
I have two of these bras tag 35s with the small hub cast iron flywheel, one narrow and the other one is wider like yours, and I just got it yesterday! Lol
I’ll take some photos of my engines and post them a bit later.