Hello Mark
Hope to help with the minor mystery .....thank you for pointing to Bernard Corbin .... my engine came from Jim Seacrest auction #3 ....Jim had several Corbin steamers .....so perhaps the E5 followed along in one of the deals.
The link to Bernard Corbin would help explain the upscale look of this Adams and Sons model .....as they are rather "plain Jane" .... as offered from the foundry .... Siebers Bros offered the sides as did Pomona ...
Is there a Corbin list of engines ? any production photos that may show the E5 in it's earlier years ?
Here are a few more photos of the engine ...not that is can hold a candle to Eric's .... but Eric if you if wish try a round of tug of war ...you're on !
Cheers Carey
last photo more typical of a Adams and Sons set of castings built up with Siebers Bros sides ... sorry still no rivets to count