Depends. If you have mechanical speedometer services handy nearby (Europe) and you like the look of the original factory gauges.
We have several specialty companies here in the US that do this, but I am not sure how comfortable you would be sending something that far. Although my recommendation below is held in high regard, you should contact them first.
I had mine repaired and it had a lot do to with the fact that I could walk across the street back then when I was working to a well know establishment here in Phoenix. And my issue was similar - the miles (odometer) wheels were not turning.
PS, I lived in Germany for 6 years, so I know how hard it is to deal with some things over there.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI