J. Wilson Hobart silver open face watch circa 1881 Ars&F Auguste Robert Stauffer Swiss key wind movement working when tested, case marked Birmingham sterling 1881 Mojon & Montandon. Back plate marked. J. Wilson Hobart . Appox case widrg 42.6 mm, Ars&F Auguste Robert Stauffer Swiss key wind movement working when tested, case marked Birmingham sterling 1881 Mojon & Montandon. Back plate marked. J. Wilson Hobart . Appox case widrg 42.6 mm