I have a Centaur watch with a stamp on the case. I assume it's the case maker, not a gold mark. I also can't figure info on the movement maker. I haven't had much luck in getting any details. I'll include pictures but it was difficult to get details to show. The watch is in surprisingly good condition and appears to runs great. Based on the style, I'm guessing it's a 60's or 70's watch. I doubt it has much value but iI think t's a neat vintage piece. The stamp on the case is very small and even wtih my best magnifier it was difficult to read. I believe it says "E O" with 3 dots on the top and bottom. The stamp is between the lugs above the 12. The movement is stamp with what I believe is F E and 140 off to the left. Again, I'm just curious about the watch, quality, history, etc. Thanks for any info!