View single post by Nabco
 Posted: Sun Jan 4th, 2009 09:12 am
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Nabco



Joined: Sat Dec 2nd, 2006
Location: Ohio, N. Carolina & Delta Seat 1C
Posts: 3836
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 Scott, i had a pretty substantial vintage collection that I have been selling off for the last year or so, at one time it consited of about 250 watches all pre 1960, it's down to less than 25 now.

To answer your question, a case that is gold filled has a layer of gold applied over a base metal, usually brass, sometimes copper, that's why you will sometimes see the term "this case shows no brassing", this basically means there is no wear through the gold showing any of the brass base metal.  You will see them labeled 20 Year GF, 25 Year GF, etc.  The more years the thicker the layer of gold and the longer it will last. 

Rolled Gold Plated (RGP), is just another way of applying gold to a base metal and is less desirable than GF, it is a less expensive way of doing it.  IMO the color and finish of a GF case looks much more like solid gold than RGP.

Hope that helps.