
Your watches are both "QED I" - later non-magnet sets were QED II. The first example: the karats differ. Karat is an indicator or how much gold is in the alloy. 24 kt is pure gold, 12 kt. is 50% gold. But the karat says nothing about what the other portion is made up of. Which is how you can have 18k yellow, white or rose gold - depends on what the other 6 kt. are made up of. RGP is thicker than most plating, so that is the better item. I think you meant it says 1/40 10 kt. Which means if you took the band and ripped off those 10kt gold caps, they would weigh about 1/40 of what the total band weighs. A very nebulous system. Yeah, some of those finish "matches" leave a lot to be desired. Some of the base metal
(jeweler's brass) cases match up to 10-12 kt gold better than odd gold mixes from other companies. Like the Bulova drivers...none of those are gold plated but they match the g.f. bands pretty nicely. For a really sucky matchup, just look at most Longines Gemini's.
