Seeking to avoid the wrath of my sensible wife (who would rather see me head for a bar or casio than a watch boutique), I found a possible candidate advertised as a Vacheron Constantin14K Yellow Gold Watch 450/28 for her. It's mechanical (not quartz) and 14 instead of 18 carat gold. It's about 60 years old (1950-1959 vintage), and there's no mention of what kind of glass it has. (Was sapphire glass used in the 50's?). It's listed as a "sports" model and has an appearance that seems more formal than sports.
Does anyone know anything about the 450/28 that I should seek or avoid?