longbike
Is a Permanent Fixture
Aqualand Addict
Posts: 6,399 
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Post by longbike on Sept 3, 2021 17:54:07 GMT -8
Aloha ,
I need to know some answers to my .... 7549-7010 Project here so I can eventually get it going.
I am not to familiar to any of this .... Change Over or Conversion if need to be done.
I was told that I could Convert a Seiko 7548 into a ...7549 Movement and I do have some Bit with my Case Project.
Does anyone know about ...... Converting these 7548 Movements so they could be used.
I was told that ....The Gearing had to be ... Switched / Hands / and so on. If so do I have to change .....The Sweep Hand
gear also for it. I know it has to be a ... 5 - Jewel Movement so any thing else is appreciated to find out.
Aloha
Louis
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lewie
Timekeeper
Posts: 263
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Post by lewie on Sept 5, 2021 7:32:47 GMT -8
Louis I ‘think’ you should be able to drop in a 7548 no problem but you would need to broach the hands to fit or get some compatible hands
original tuna hands are not the same (from memory I think it’s the hour hand)
again I think its because of the extra weight of the larger tuna hands
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longbike
Is a Permanent Fixture
Aqualand Addict
Posts: 6,399
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Post by longbike on Sept 5, 2021 10:01:13 GMT -8
AlohaSir, Hi Paul , Paul I have some Bits that came with the Case for use. It contains these parts ad the ..Needed Parts to convert if possible. What I need to find out is ...... If The Sweep Hand Gear Needs To Be Changed To A ... 7549 One ". This Sweep Hand Gear :  ________________________________ Parts here are like this : Parts that are said that needs to be changed For Conversion :  _______________________________ Parts I have now :   ![]()    |
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Post by meanoldmanning on Sept 5, 2021 15:40:46 GMT -8
Louis,
Yes, you need to swap out the forth wheel for the sweep hand because it has a longer pinion to accommodate the taller cannon and hour wheel pinions.
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Post by meanoldmanning on Sept 5, 2021 16:52:39 GMT -8
Here’s some measurements I posted on the other forum a few years ago
OD of cannon pinion for 7548, 46, etc. is .90mm and hour wheel is 1.5mm.
OD of the cannon pinion for a 7549 is 1.40mm and hour wheel is 2.30mm.
4th wheel length difference between 7549 and other 754x
7549 - 6.14mm
The other 754x - 5.64mm
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Post by peterr on Sept 6, 2021 0:01:10 GMT -8
hi louie, i located that 7548 movement, do you still need it? also, what do you think of this dial? it has become a spare for me, i bet i can find the hands. dial and hands are yobokies, i really like harold's products....  let me know if either work for you. aloha, peter |
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longbike
Is a Permanent Fixture
Aqualand Addict
Posts: 6,399
|
Post by longbike on Sept 6, 2021 9:21:35 GMT -8
hi louie, i located that 7548 movement, do you still need it? also, what do you think of this dial? it has become a spare for me, i bet i can find the hands. dial and hands are yobokies, i really like harold's products.... let me know if either work for you. aloha, peter Aloha Sir, Hi Pete wow that looks neat Parts like that I am sure can be used because then the watch can be used for daily uses too. I am not that picky for this project but what I can find I'll use it for now. Here in the Middle Of This Ocean things are very hard to find like this hobby of ours so what I can find really helps too. You can message me for what you have Sir and we can go form there if that be fine with you. Louis Louis |
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