Found a Silvana DH on eBay the other day in some obscure ex Russian state,and as I've wanted a German ww2 military watch for some time I thought I would take a chance,it was listed as not working and from the pictures I could see it was without its crown, on arrival I had quite a job removing the case back,and by the look of the scratches others had tried too. I don't think it had been removed in a long time and when removed I was pleased to find the movement complete albeit very dirty,water had got in past the stem at some time and the dial was very dirty and moldy and the hands rusty, and the keyless work rusted solid, I stripped the watch down and all parts except keyless work were ok so set about cleaning.as I don't have a cleaning machine all was done by hand and I'm still learning as I go! In the areas on the bridges where the corrosion was worse the silver finish is worn away but that aside when reassembled the watch ran fine, I then set about the dial with much trepidation,but after a gentle start found the dial to be very sound so a little more time and effort got a good result. before.and after.now the watch is reassembled and running fine but still needs the case repaired and rechromed and some more pics taken so more to follow,but as this watch only cost £18 with £5 postage I think I've done ok.