I bought this old vintage (40s/50s?) Derrick watch off Ebay, and the seller stated the movement was an Arogno 190N. However looking at the picture of the movement, it seems as though it might be a bit dodgy. By that I mean that some of the screws look too shiny, the balance jewel appears to be a different colour to the rest of the jewels, and one of the screws is not fully screwed down. Also the writing '15 jewels' almost looks more like '5' jewels, maybe the '1' just wore off slightly? I only paid about £15 inc postage, so not a massive loss if it is a lemon, but still I'm curious to know. Please can you take a look and give your opinion? Any and all advice/help is much appreciated.