Hello! I've made a few trade attempts with other watches I own on this sub but it never worked out unfortunately, so I decided to try one more time with the Gruen. I have an eBay store with a lot of reviews so if you're worried about my honesty, I can send you a link to my store. I have this Gruen which I'm willing to trade for something more modern, under 40mm. Something around 36mm would be perfect. The approximate traditing value is $1500. The case size of the Gruen is approx. 40mm. The watch shows signs of wear consistent with it's age. Movement is running at time of posting, however, it was not tested for accuracy of time or duration of power reserve and may need service at your discretion. Let me know what you got 👍