I have for sale a Filson Mackinaw Chronograph in 43mm in very good condition with original box and papers. This watch is water resistant to 20 ATM, features a screw down crown, and a leather strap. It is in need of a new battery. Manufactured by Shinola for Filson, this was part of the very first generation of Filson watches made. It is a hardy field watch that is perfect for everyday wear!