The 1675 is my favorite rep build due to the many variations of the genuine one and not to mention the correct hand stack on the reps. You can basically do it however you please. My good friend Pompompurin over at RWI listed just the case for sale but he offered if I want him to build it for me.  If you know him, he is very knowledgable and  is very particular about his builds.  And by budget, I mean in relative to building it with VN/Milk parts anyway.   Since there are so many variations, I opted with the MK1 Long 'E' dial with stubby-ish crown guards, this was the look had in mind: One thing about me is I like the "overpolished" gen look instead of the forced old beat up look. To me it seems realistic that way, if you look at listings from Japanese auction sites, HQmilton etc. (Unless you're buying from Christies or Sotheby's of course  ) Specs as followed: Reworked JKF/BP case with folded bracelet and thinned caseback
Faded stock insert (looks olive in some lights)
Vietnam Mark 1 Dial
Helenarou GMT handset
Hangzhou HZ6460 movement
Rafflestime long seconds hands 
Rafflestime 5.3mm crown
Rafflesdial Open 6/9 DWO
    Some pics:  Cheers