I have a Seiko sbbn031 that I want to make some changes on. I searched for this, but didn't see anything specifically on the Quartz 7c46 Tuna so I apologize if this is redundant. I have taken the movement out of many of the different automatic movements from both Seiko and ETA/Sellita but never from this one. Here is what I am trying to do. 1) Change the crappy etched Crown for a older style engraved & Signed "S" Crown. 2) Swap the plain bezel insert to a Black fully lumed bezel insert, 3) Swap out the hardlex crystal to a Sapphire one& 4) Replace the Second hand with one that has the lume dot on the other end. I have done all of these to other Seikos like SKX & Turtle but this one is a bit different so:
1) is there something to depress to disengage the crown stem? Is it the little depression/circle right below the "JA" Japan in my pic near the Crown? Does it matter if the Crown is in Hacked or unhacked position? I'm guessing that it does not, but better to check and be safe than sorry later.
2) What about removing the bezel & bezel insert? Does it remove in the same way as skx or Turtle? Just pop it off with a case knife? I tried & it didn't want to budge. Is there a trick? I don't see a little indentation for the case knife idk...
3) What about the Crystal? Once the Crown & Stem are out is there anything else I need to do? I don't see any tabs or any sort of holder in there, but maybe I am missing something