I don't really have much to offer the forum as I don't have a watch collection, this is my Grandfathers bumper I have inherited. My Dad had the piece serviced a few years after my Grandfathers passing, I am fairly certain the dial has been re done, looking from what I have seen here on this forum its a pretty bad job too, cant blame my dad though, he was trying to gift me something I would really appreciate and did and still do. I have no idea of the movement cal as I have never seen inside the case back. I only know its a bumper due to the feeling feel on your wrist, or when rocking it from side to side as I witnessed my Grandfather do, at rest at 6pm every evening while watching the ABC news in his oversize leather recliner when I was knee high to a Grasshopper. I kind of wish now that my Father only had the movement serviced, to me it looks over painted, over lacquered and not square and symmetrical, but most importantly it's not the same dial face my Grandfather looked at after his exit from military service after WW2 and the rest of his life and journeys and life experience around the planet till his last breath......shame really.
I know its off topic, I have included a pic of an original service receipt and the original case.
Apologies I don't have a macro lens for my D90.