Sextant Chronograph

A useful accessory

Star astimatizing lens

Star astimatizing lens

Deviation

Information about compass deviation

The vernier

How to read the vernier

Construction of a spherical compass

Construction of a spherical compass

Schüler double prism

Schüler double prism

Combined dip and index error adjustment

Combined dip and index error adjustment

Sextant mirrors

Sextant mirrors

Construction of a sextant

Construction of a sextant

Service & Repair

Service & Repair

Compass adjustment

Compass adjustment
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