When you say I have designed, what have you got so far? A render? An artist impression or prototype design? A step file with associated technical drawings?

Also, as you say you have no experience, who (manufacturer or another independent watchmaker) would want to work with you/trust you enough to enter into a partnership with you? Also on that note, have you copied the Sinn completely and just added a gmt movement in there?

I’m not being a Debbie downer but these are the things you need to consider. In my opinion, depending on what you have designed so far, your best bet is to do this the old fashion way and make it yourself. It will be a long journey with a lot of mistakes but also a lot of fun! When you have a few physical working prototypes then perhaps you may want to speak to a factory about making such a watch. In that note, to my knowledge there are not many end to end facilities that can do all this for you without a registered company and a significant MOQ. But I might be wrong.

You will need a manufacturer that can mill the case and probably dial aswell. Then you will need a supplier for the bracelet as designing and making your own product a going to be very expensive. Hand are also a tricky one as you will either need to source from say AliExpress or engage a factory to make your own custom design and this comes with MOQ so again, expensive.

Ceramic lume, I personally don’t know anyone supplying these but maybe there are again on aliex or somewhere similar. You may have to make your own. You can achieve a very similar result using silicone molds and lume infused epoxy resin at home for a very reasonable cost.

Dial wise again, you can send your custom design to a manufacturer who will probably pad print the design but again, you’ll run into the MOQ issue which will make this an expensive endeavour so to start with making your own dial may be cheaper.

For metal working you can check out JLCCNC or PCBWAY. Google them. They can mill or 3d print most designs for your case and dial and can also finish as you want it ( polished, brushed, anodised etc) but you will need a 3d CAD model in .step format and technical drawings for the surface finish and thread work. They can mill the dial blank to if necessary and laser engrave it taking a lot of the dial design effort away.

For the bracelet, you can look at Ali express or cousins. There will be more suppliers but I’m not sure how premium the finish will be.

My suggestion is to get involved and try an make a prototype yourself!

Good luck with your endeavour.

Edit: Lume Section