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·I would like to propose to your attention a rundown of the different case backs
fitted to early Speedmaster Professional series:
The first Speedmaster Professionals case backs with the large Hippocampus are distinguished by the fact
that they were equipped with a step, like the previous Speedmaster "Non Professional" references:
This type of case back was used on the ref. 105.012s from 1963 to 1965
From the ref. 105.012-66 on this step was removed.
This type was mounted since on the ref. 105.012 HF-66 and CB-66 and later on the ref. 145.012-67, 145.012-68,
145.022-68 transitional and 145.022-69 Pre Moon
Immediately after the moon landing, the following case backs were used:
This is the case back of a ref. 145022-69 called "Straight Writing".
This is a picture of a rare "ApolloXI" variant of the "Straight Writing"case back always being used
on the ref. 145.022-69 and apparently sold only on the Japanese market.
Subsequently Omega installed case back with the characteristic central medallion:
This is a rare "Non Nasa" case back used for a short period on the ref. 145.022-71
To finish with the most common model mounted, with some small variations though, for a relatively long period from the ref. 145.022-71 onwards.
I would have a favorite ...
Which is yours?
Cheers
fitted to early Speedmaster Professional series:
The first Speedmaster Professionals case backs with the large Hippocampus are distinguished by the fact
that they were equipped with a step, like the previous Speedmaster "Non Professional" references:
This type of case back was used on the ref. 105.012s from 1963 to 1965
From the ref. 105.012-66 on this step was removed.
This type was mounted since on the ref. 105.012 HF-66 and CB-66 and later on the ref. 145.012-67, 145.012-68,
145.022-68 transitional and 145.022-69 Pre Moon
Immediately after the moon landing, the following case backs were used:
This is the case back of a ref. 145022-69 called "Straight Writing".
This is a picture of a rare "ApolloXI" variant of the "Straight Writing"case back always being used
on the ref. 145.022-69 and apparently sold only on the Japanese market.
Subsequently Omega installed case back with the characteristic central medallion:
This is a rare "Non Nasa" case back used for a short period on the ref. 145.022-71
To finish with the most common model mounted, with some small variations though, for a relatively long period from the ref. 145.022-71 onwards.
I would have a favorite ...
Which is yours?
Cheers
