Hi Bruce, I clicked on the pictures and they took me to the same small ones in Photobucket, so I think they were uploaded that small and will not be able to be made any larger...
As for being a #55G Deluxe, it sure looks authentic from here... base size and layout matches mine:
Mine however, has a special, green ID tag made for "Ametek Aerospace"
There are a few other members here with Deluxe models in both #20 and #55
This is the information I was given:
John Loughner developed and made these for John Foskett. While officially unauthorized by Tom Jensen Jr., They were offered only through Jensen via John Foskett, the then sales manager/general manager of Jensen Steam engines. Also featured on these engines is a ball-bearing Jensen 15 generator/lamp post.
(but the one you posted does not look to have a ball-bearing 15...)