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2403 Co-Axial Movement

I'm wondering if anyone know how i might find more information/history/photos on this movement that is in my AT Railmaster 2503.52. I know it's a comparatively simple movement with no complications but that's just one reason of many that i chose this particular watch. I also know it has none of the electromagnetic shielding that was featured on the original movement. I was also wondering if it's related to any of the 2500 derivations. I do like the cool display back but i was just curious to see if anyone had anything else on it. I have come up empty on TZ and Google in general. Thanks!

Messages In This Thread

2403 Co-Axial Movement
Re: 2403 Co-Axial Movement *LINK*
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