Hi Guys! I'm Just wondering if anyone could help me out, I’ve had this beauty for about 20 years, but she is pretty battered and bruised... I would love to get her restored to her former glory – but I’m thinking that would cost me more than I could afford!! (any ideas how much) There is a number on the side 77407 - but is that a batch number rather than a model No? Done a Quick Google and I think She could be a 2447 N or maybe a Valjoux 72 but im not 100% sure – any help would be awesome!