After dealing with the CHS Craptastic Movement for several months now trying to figure out how to make it more reliable, and finding that replacing the majority of the guts with ETA 2824/2836 guts seems to at least get it to run great, I was bouncing back and forth between getting a Rolex 3186 or creating my own SH3185. In the end, I enjoy tinkering more than assembling, so building a hybrid SH3185 won out for my GMT 116710LN Franken.
Build consists of
Part Number
Description
B3155-335-Y1
Minute Pinion w/ Cannon Pinion
B3155-360-G1
Second Wheel
B3175-260-Y1
Minute Wheel 24hr
B3185-268-L1
Keyless Works Cover Plate
B3185-284-Y1
Hour Wheel 12hr
B3185-600-K1
Seating for Date Indicator
B3185-614-Y1
Date Jumper
B3185-623-Y1
Finger for Date
B3185-625-Y1
Date Wheel Mounted
B3185-660-Y1
Jumping Hours Module
B3185-662-Y1
Corrector Wheel
B3185-670-Y1
Intermediate Date Wheel
And now on to the fun stuff
To start, I will show you 2 spots you need to modify on the main plate. The Jumping Hours Module sits in here and these 2 spots need to be filed down to allow it to sit flush and move freely. I used a couple small files to do this.
Some pics while assembling the movement. What I did was place the SH3135 Parts I was removing in a line in order that I took them off. I then placed the Rolex Parts I was replacing them with right below them so I didn’t miss a step or use the wrong part. If you’ve taken these apart before, its pretty easy to figure out what goes where.
And here is the finished movement with the Gen Date Disc
With Gen Hands and Dial Installed
Test fit into the case. The Movement is a little loose in the case, so I had to use longer tabs to hold it in place and centered in the case.
A couple pics of the final product. The Crown Height of the SH3185 sits a touch lower than the 2836 CHS movement that comes in these. It isn’t enough to affect performance, but it is something to be aware of. About less than .5mm.
And some glamour shots
So far, the movement is running great. The jumping hours module hasn’t had any issues, I had to go from Date 13 to Date 3, and the movement itself averages ~+4s/d
All in all, a happy medium between the unreliable CHS movement and the $2k Rolex 3186.
Now on to the next project.
Build consists of
- Gen Bezel (Assembly and insert)
- Gen Chromolight Dial
- Gen Chromolight Hands
- Gen Datedisc
- Gen Xtal
- Gen Crown
- SH3185
- ARF 904l Bracelet
- Noob Case
Part Number
Description
B3155-335-Y1
Minute Pinion w/ Cannon Pinion
B3155-360-G1
Second Wheel
B3175-260-Y1
Minute Wheel 24hr
B3185-268-L1
Keyless Works Cover Plate
B3185-284-Y1
Hour Wheel 12hr
B3185-600-K1
Seating for Date Indicator
B3185-614-Y1
Date Jumper
B3185-623-Y1
Finger for Date
B3185-625-Y1
Date Wheel Mounted
B3185-660-Y1
Jumping Hours Module
B3185-662-Y1
Corrector Wheel
B3185-670-Y1
Intermediate Date Wheel
And now on to the fun stuff
To start, I will show you 2 spots you need to modify on the main plate. The Jumping Hours Module sits in here and these 2 spots need to be filed down to allow it to sit flush and move freely. I used a couple small files to do this.
Some pics while assembling the movement. What I did was place the SH3135 Parts I was removing in a line in order that I took them off. I then placed the Rolex Parts I was replacing them with right below them so I didn’t miss a step or use the wrong part. If you’ve taken these apart before, its pretty easy to figure out what goes where.
And here is the finished movement with the Gen Date Disc
With Gen Hands and Dial Installed
Test fit into the case. The Movement is a little loose in the case, so I had to use longer tabs to hold it in place and centered in the case.
A couple pics of the final product. The Crown Height of the SH3185 sits a touch lower than the 2836 CHS movement that comes in these. It isn’t enough to affect performance, but it is something to be aware of. About less than .5mm.
And some glamour shots
So far, the movement is running great. The jumping hours module hasn’t had any issues, I had to go from Date 13 to Date 3, and the movement itself averages ~+4s/d
All in all, a happy medium between the unreliable CHS movement and the $2k Rolex 3186.
Now on to the next project.
