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This was my second Brunton Pocket Transit. This one dates to about 1945-1946. It is not more recent than 1946 since it does not have the trademark claim on the lid.
Specifications:
- Manufacturer: William Ainsworth and Sons.
- Date of Manufacture: 1944-1946 based on serial number extrapolation
- Materials:
- Body: Aluminum
- Crystal: Glass
- Size: 3-1/16 X 2-3/4 X 1-1/4 closed
- Needle: Magnetic steel
- Damping: None
- Pivot: Jewelled
- Graduations: Quads, by 10 degrees, with tick marks at every degree and longer marks at every 5 degrees.
- Declination: Adjustable via screw-driven gear.
- Weight: 8.5 oz
- Stop: pin actuated by lid when closed.
- Description: This is a genuine Ainsworth Brunton Pocket Transit. The body of the instrument is green 'crinkle' painted aluminum. The face of the transit is black-painted aluminum with white markings. The inside of the lid contains a round mirror with an oval sighting window at the hinge side, and a center-line which is engraved perpendicular to the hinge, bisecting the oval sighting window. The side opposite the hinge has the small folding sight, which folds flat against the outside of the lid. The long sight is attached to the body of the compass, opposite the hinge. The long sight has a fold-up tip that allows the instrument to be laid out with an 8-1/4 inch sight baseline.
- Condition: Excellent. Needle swings free on jewelled bearing. Sights are present and intact, and move easily. The mirror is unbroken, clear, and free of any foxing or oxidization spots. Retaining rings are in place and in good condition. Level vials are intact, the fluid is present and clear and the bubbles have been retained.
- Damage: Various nicks and scratches on outer case, as well as the complete wearing away of paint on several high points. Black paint on brass parts is worn off in several spots, and there is some brass oxidization (verdegris).
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