Comments:
Questions for "Dje" and other experts
Hai Dje & JLC Addicts,
1. Does the new Reverso Squadra Home Time movement ( Cal 977 ) equivalent to Cal 972 and 975 ?
Can I say that Cal 977 is also "Autotractor " movement ( as review by Dje 
?
2. Does the movement in Master Compressor Geographic (Cal 923) use ceramic ball bearings and variable inertia balance ?
3. Why JlC used Cal 923 for master compressor geographic instead of Cal 937 used in master geographic ?
Does cal 923 a new generation movement ?
4. What is your opinion on Master compressor geographic ?
Thanks a lot Guys
Budi Purwanto
Answers
Hi,
Hi Budi,
For question 1, yes it is basically the same calibre conception, but implemented differently. 977 is a square caliber with a smaller rotor to fit in a square watch, while the two others 972 and 975 are nearly identical with just a gold rotor on 975 and a different different organization to cope with.
Yes 977 is "autotractor" too. The review of the "autotractor" was not made by me but by Suitbert Walter: www.thepurists.net m
For question 2, I don't think it is as it was launched a year before the Hometime "autotractor" 975 calibre which was the first one. Several calibres have been "autotractorized" since but their calibre number has changed, not this one. We definitely need to check with JLC as I can't find any precise information.
For question 3 I don't know exactly but as it has a different dial organization it has a different calibre number. It is the same base calibre but without the power reserve indicator and with a different design for the watch. 937 is autotractorized. It was 929/3 before being autractorized. I don't think 923 is a new generation movement.
For question 4, the Compressor Geographic is close to the Compressor Dualmatic which has a calibre IMVHO better suited to sport activity. So unless you need to be able to see the different timezones I'd better choose the Dualmatic. But it's very personal as I would have no need of any GMT function.
Cheers
Dje
Hi Budi,
For question 1, yes it is basically the same calibre conception, but implemented differently. 977 is a square caliber with a smaller rotor to fit in a square watch, while the two others 972 and 975 are nearly identical with just a gold rotor on 975 and a different different organization to cope with.
Yes 977 is "autotractor" too. The review of the "autotractor" was not made by me but by Suitbert Walter: www.thepurists.net m
For question 2, I don't think it is as it was launched a year before the Hometime "autotractor" 975 calibre which was the first one. Several calibres have been "autotractorized" since but their calibre number has changed, not this one. We definitely need to check with JLC as I can't find any precise information.
For question 3 I don't know exactly but as it has a different dial organization it has a different calibre number. It is the same base calibre but without the power reserve indicator and with a different design for the watch. 937 is autotractorized. It was 929/3 before being autractorized. I don't think 923 is a new generation movement.
For question 4, the Compressor Geographic is close to the Compressor Dualmatic which has a calibre IMVHO better suited to sport activity. So unless you need to be able to see the different timezones I'd better choose the Dualmatic. But it's very personal as I would have no need of any GMT function.
Cheers
Dje