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Wild NA2 (new style)
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: 01. Wild T1A usermanual
19,90 CHF
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: 02. Wild NT1 UserManual
19,90 CHF
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: 03. Wild T1A servicemanual
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: 04. Wild - theprinciple ofmodern surveyinginstruments
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: 05. Wild T1 (70) usermanual
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: 06. Service manual forWild Heerbrugg T1A
34,90 CHF
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: 07. Service manual forWild Heerbrugg T1(70)
49,90 CHF
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: 08. Wild NT1 brochure
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Manufacturer

Wild T1 Double Centre Theodolite

T1 (original model): 1933 - 1938
NT1 (new T1): 1938 - 1956
T1A (with automatic vertical Collimation): 1957 - 1973
T1 Micrometer Theodolite (model 70): 1973 - 1996

The Wild T1 is a Double Centre Theodolite with two independend cylindrical axes and they where produced between 1933 and 1996 in mainly four versions as shown abouve.

The Wild T1A Double Center Theodolite is used for low-order triangulation, cadastral work, tunnel traverses, general traversing, tacheometry, property surveys, mine surveys, building site lay-outs etc. - in fact for most survey and engineering tasks where first or second order accuracies are not essential.

After the usual initial leveling-up, using the footscrews and plate level, the T1A is ready for vertical angles to be measured, there being no index level to center. The simple automatic vertical index, which replaces the usual level, thus makes vertical circle reading an easy matter and, as there are no mechanical parts, the liquid compensator has nothing to wear out-and nothing to maintain.

Each circle is read with the aid of an optical micrometer whose drum is cc).graduated to 20” (or 1c), with estimation made easily to 5” (or 10cc). Having two independent cylindrical vertical axes and two horizontal clamps (one each for the lower and upper plate and shaped differently to avoid confusion) the T1A allows the repetition method to be used for observing.

The T1A-E is identical to the T1A, except that its telescope provides an upright image - a feature often appreciated by users unaccustomed to working with an image that is reversed both laterally and vertically.

As the T1A (and T1A-E) can be removed from the tribrach without disturbing the centering, the famous Wild traversing equipment can be used with this theodolite, together with the full range of accessories, which is tabulated later.