Hey mate...sad to say but say "good bye" to "close to gen".
The 1675 are very hard to mod to get it close to gen and the best base isn't a 1675 straight from a dealer either.
The good news is...once you don't look for a "close to gen" look you can make this your own interpretation of a vintage 1675 and this can lead you to a very nice watch overall
What I'd do to your watch (or any other new 1675) is to vintagize the dial and hands, bleach the inlay and "torture" the case in a bag with screws and nails, then repolish it. Do this until you are happy with the look and that's it.
I had several 1675 in the past and tried to get them "close to gen" but always ended up with still having just a rep (but an expensive one, some with gen dial, inlay, crystal, crown) on the wrist, easily to spot as one from those who know where to look at. Hence...I always felt unhappy because I'm one of the few who can spot a 1675 rep on the wrist.
Today I'd say no need to spent $$$ in getting a 1675 base modded or even frankened. Just vintagize it, make it your very own watch...best one can do