细节
A fine oxidised-brass surveying level,
signed on the limb Troughton & Simms London, the telescope with rack and pinion focusing, ray-shade, dust-slide, level and cross-bubble, the limb with compass and scale magnifier, on four-screw tripod mounting, with trade label for Douglas & Wallis LTD., in fitted mahogany case with two brass carrying handles, 24½in. (62.2cm.) wide
See Illustration
signed on the limb Troughton & Simms London, the telescope with rack and pinion focusing, ray-shade, dust-slide, level and cross-bubble, the limb with compass and scale magnifier, on four-screw tripod mounting, with trade label for Douglas & Wallis LTD., in fitted mahogany case with two brass carrying handles, 24½in. (62.2cm.) wide
See Illustration