- 30/8/06
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Hello,
I had an ORF Seamaster 300M on the bench recently. It was the first one I've serviced in comparison to many VSF's. Here are some thoughts and observations on the movement aspect of it. I recently purged a lot of photos, so I'm a bit lacking in VSF movement shots at the moment.
Both movements are decorated A2824's. My general impression is that VSF uses higher quality clone A2824s. For instance, VSF uses balances with Lyre style Incabloc shock protection found on higher end grades of 2824, vs ORF's Novodiac shock spring. General fit, finish, and cleanliness is also better on the VSF movements.
The automatic rotor is attached differently from VSF. I actually prefer ORF in this regard, as it has no glued on decoration to fall off.
ORF:
VSF:
The decorations are also handled differently. VSF is one large piece that fits over the 2824 and attached with 3 screws under the dial. ORF has smaller plates that attach directly to the 2824. The nod goes to ORF here as the movement is much easier to access for repair or regulation than on VSF.
ORF:
VSF:
Now, what I consider the biggest difference, is how the automatic bridge has been altered in the ORF. I believe this was to improve the look of the decorated movement. One of the reversing wheels was removed, the bridge has been cut and altered, and a click spring installed. This makes the automatic winding system on ORF's unidirectional only.
There are also custom parts there that won't be available to replace.
Functionally you won't notice a difference in winding or power reserve, but unidirectional movements like the 7750 and Miyota 9015 often get labeled as "loud and helicoptory" as the rotor has less resistance in one direction.
I'm not sure how to end this, other than I hope you find that interesting.
I had an ORF Seamaster 300M on the bench recently. It was the first one I've serviced in comparison to many VSF's. Here are some thoughts and observations on the movement aspect of it. I recently purged a lot of photos, so I'm a bit lacking in VSF movement shots at the moment.
Both movements are decorated A2824's. My general impression is that VSF uses higher quality clone A2824s. For instance, VSF uses balances with Lyre style Incabloc shock protection found on higher end grades of 2824, vs ORF's Novodiac shock spring. General fit, finish, and cleanliness is also better on the VSF movements.
The automatic rotor is attached differently from VSF. I actually prefer ORF in this regard, as it has no glued on decoration to fall off.
ORF:
VSF:
The decorations are also handled differently. VSF is one large piece that fits over the 2824 and attached with 3 screws under the dial. ORF has smaller plates that attach directly to the 2824. The nod goes to ORF here as the movement is much easier to access for repair or regulation than on VSF.
ORF:
VSF:
Now, what I consider the biggest difference, is how the automatic bridge has been altered in the ORF. I believe this was to improve the look of the decorated movement. One of the reversing wheels was removed, the bridge has been cut and altered, and a click spring installed. This makes the automatic winding system on ORF's unidirectional only.
There are also custom parts there that won't be available to replace.
Functionally you won't notice a difference in winding or power reserve, but unidirectional movements like the 7750 and Miyota 9015 often get labeled as "loud and helicoptory" as the rotor has less resistance in one direction.
I'm not sure how to end this, other than I hope you find that interesting.
