Panerai caliber OP XXI

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Brand:Panerai
Reference:OP XXI
Base: ETA 7750
Movement:Automatic
Display:Analog
Diameter:36.60
Jewels:40
Reserve:42
Frequency:28800
Chronograph:Chronograph, Column wheel, Foudroyante, Rattrapante
Hands:Hours, Minutes, Small Seconds
Panerai caliber OP XXI

OP XXI description

Foudroyante split-seconds movement based on a a LaJoux-Perret modification of the 7750.

All watches using the Panerai OP XXI movement:

Panerai Radiomir 1/8 Second (PAM00246)

PAM00246 Panerai Radiomir 1/8 Second
Panerai Radiomir Regatta 1/8th Second Titanium (PAM00343)

PAM00343 Panerai Radiomir Regatta 1/8th Second Titanium
Panerai Ferrari Scuderia 1/8 Second (FER00025)

FER00025 Panerai Ferrari Scuderia 1/8 Second