Ever since I bought my vintage Roamer, which has a gold plated case, I wanted to get a matching crown for it. It came with a silver coloured steel one, which although perfectly functional and in good condition, bugged me increasingly as it was not in keeping with the rest of the watch.
So I tried to get hold of a Roamer signed gold crown from Cousins UK, using the case number(s) on the caseback. I had to submit a request for a non-listed item as they didn't have it listed on the website, but I was told they might still have it in stock. But they came back and said it was obsolete and could not be obtained . I decided to try and get a generic gold crown from them, it arrived and when I tried to fit it, the tap size was too small ! This was because I could not measure the tap size down to a small enough unit (0.1mm) as I have no micrometer or calipers. Plus it was the wrong sort of crown, it did not cover up the case tube and was stuck out on the end of it .
Having spoken to the guy at RLT Watches (very helpful and friendly guy), I found I needed a waterproof type crown. "Give it one last try", I thought, and I ordered a tap 12 gold waterproof crown from Cousins. It arrived today in the post and, lo and behold, it fit ! So now the watch has a matching gold plated crown, and I put it on a nicer Darlena black leather strap. I'm now a very happy man, mission accomplished .