This is a 17 jewel Gruen long
Near perfect dial new glass crystal.
The movement was just serviced and is keeping time.
I am not sure what the case material is, the inside is marked with
numerals but I am not sure of the material.
New black leather strap.
Over 41mm long.
This is a very old watch most like from the 20's or 30's.
Click on any photo for a larger image.