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3019 to 4030 conversion questions


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Hey lads! Have a few questions for the gurus here on the 16520s. 

I’m about to finish up by 1665 build and move onto something else, ive started a 16520 build, just bought a NOS 3019. I know they changed some stuff from the 3019 to the rebranded 400 that the Rolex movement is based on, but not sure if any of it will inhibit the use of the 3019. 

what components would one need to convert it fully to work in a 16520 build. 
the 3019 and 400 have a date function, so I assume the base plates are different with the 400 and the 4030 movement. Can the 3019 or 400 be used straight up into the case or need changes first to make it work. 

this is only my preliminary work on it, collecting the parts etc... I plan to build it over the next few months, but I want it to be right. Next big obstacle will be the dial 😅 the gens have taken off big time 😅

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