I believe this one is a U-790 incused THOMAS. The dimensions are 3- 3/8 X 3-5/8 high which of course doesn't match the Guide. The 790 in the book shows no incused marking [seq. 4007]. The skirt has a definate flare to it and the base extends down below the skirt. So what is it ? Confirmed, U-790. Unreported incused marking. Thank you Elton . Thanks for the help.

Dan