Millers Falls no.17BG
7" long with a 1-5/8" cutter, adjustable mouth and a standard 20 deg. bed
The "B" was added as product number and the "G" most likely stands for Government as tools were made specially for the Government then stamped and inventoried separately from the rest of the stock.
All hand planes have only been cleaned and de-rusted to the point where the buyer can see the true condition and potential of the plane. They have not been tuned nor sharpened unless stated otherwise. (042)