repair, restoration & sales of

Antique Surveying Instruments

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Restoration Services

Compass Restoration

We properly restore the functionality, as well as the original beauty, of early surveying instruments. It is our intention to honor the colonial craftsman by adhering to their standards.

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Microscope Restoration

We offer repair and replication of missing pieces on 18th and early 19th century microscopes. We have access to a thorough database of original microscopes and ancillary items as models for replicas.

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Clock Dial

The vast majority of 18th century brass face, tall case clocks have had the silvered dials polished off. We successfully replicate the original silvering process using 18th century materials.

Instruments for sale


Mason Essex Bridge Compass


Wooden Semi-Circumferentor


Houghton Copy Theodolate

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Ramsden-Style 4-Vane Theodolite

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Restoration of a 17th Century Alta-Azimuth Theodolite

About 12 years ago I was fortunate to obtain a 17th century English theodolite complete with its original, octagonal box and Jacob’s staff adaptor. At the time of acquisition I was not familiar with the names engraved on the arms of the azimuth plate. Once I began to research the names, I realized this was […]

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