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C. L. BERGER & SONS ENGINEERS' & SURVEYORS' TRANSIT MODEL 1c 1945 - $497 (Hamilton)
condition:
excellent
make / manufacturer:
C. L. Berger & Sons, Boston, MA
model name / number:
Model 1c
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You are invited to purchase a superb and highly collectible vintage C. L. Berger & Sons of Boston, MA USA Engineers' and Surveyors' transit Model 1c Serial Number 28115 dating from 1945. This instrument comes mounted on its original wood plinth and is ready to be proudly displayed in an engineer's or surveyor's office, construction company office, or, alternately, in a residential setting. This is a fully functional precision scientific instrument that can even be used to this day for exacting engineering or survey work in the field.
Accompanying this listing is a catalogue cut of this model No. 1c transit that was extracted from my personal copy of the 1910 edition of the "Illustrated Hand-Book and Catalogue of the Engineers' and Surveyors' Instruments of Precision Made By C. L. Berger & Sons, Successors to Buff & Berger, No. 9 Province Court, Boston, Mass., U.S.A." The exact similarities to the listed instrument are readily apparent by comparing the catalogue cut to the images of the instrument presented with this listing.
C.L. Berger & Sons engineering and surveying instruments were trusted by surveyors, engineers, major railroads, and construction companies throughout the United States for well over a century since the company's founding in 1871 as Buff & Berger. The precision of function, superb level of craftsmanship, and the high level of durability of their instruments have made them highly collectible today.
IMAGES:
The images of this transit that accompany this listing were captured under ambient lighting conditions and are to be considered to be an integral part of this listing. Please view all of the images to confirm the transit's current condition and for up-close views of its key components. Please click on the images for a larger view.
KEY FEATURES:
* Horizontal circle 6 1/4 inches with edge graduation with two double verniers reading to minutes in two rows of figures in opposite directions from 0 to 360 degrees.
* Figures on the limb and verniers are inclined in the direction they should be read.
* Verniers and graduations are protected with fine plate glass and graduations are slivered. Periferal verniers are provided with ground glass shades.
* Magnetic needle in compass is 4 1/2 inches long and provided with an external arrest mechanism.
* Adjustment provided for the vertical plane of the telescope with vertical angle/elevation indicated on side vernier scale.
* Telescope is 11.5 inches long giving an erect flat field image to the edge with an objective aperture 1.25 inches and having a power of 24 diameters (24x). Eyepiece is provided with an improved screw arrangement for the accurate focusing of cross-wires. Brass focusing knob is located on the top of the scope for ease of focus adjustment.
* Instrument provided with a spring tangent screw and an improved lower tangent screw. There are four (4) leveling screws provided.
* Shifting center to set instrument exactly over a given point.
* Spirit-levels ground and extra sensitive.
* Line of collimation correct on all distances without adjustable object-slide.
* Instrument as mounted on its wood plinth weighs 20 pounds and stands 16 inches tall with the telescope set in the level position.
STATEMENT OF CONDITION:
* Telescope optics are clean and clear with no evidence of fogging, delamination, lens fungus or other optical defects. Telescope provides sharp images free of distortion.
* All spirit levels are intact, full of fluid and fully functional.
* All mechanical adjustments work smoothly and precisely without binding.
* This instrument was recently professionally cleaned and is in excellent cosmetic condition. This transit has been well cared for over the years and is complete with its original accessories (minus the tripod and carrying case), making it an excellent addition to a surveying collection, engineering office display, museum display, or antique scientific instrument collection.
* Original brass and black japanned finish displays beautifully with just a nominal amount of normal age-related wear.
* Wood plinth is in good structural condition with some evidence of age-related wear.
* No wood carrying case or tripod. Transit is set up on its original wood plinth for display in a collection.
Reasonable offers considered. Free pickup in Hamilton, Montana