Hi, I dabble in antique jewelry, so I am by no means an expert but I'm pretty sure your ring would be pre-1940 if it's indeed vintage. White metal was in during the 1920-19302, but so passe in the 1940s (itwas yellow gold or pink gold for them).
Close up it has nice milgraining, like my antique pieces, but I couldn't say for sure it was old from the pic.
750 is the stamp for 18Kt, usually used outside the US, but even my 18Kt vintage stuff from Europe uses 18Kt stamp, not 750.
Close up it has nice milgraining, like my antique pieces, but I couldn't say for sure it was old from the pic.
750 is the stamp for 18Kt, usually used outside the US, but even my 18Kt vintage stuff from Europe uses 18Kt stamp, not 750.