Special Features
O/a dimns 6.000 in. Lg, 4.562 in. W, 1.375 in. Base width; main circle 1 degrees per division; micrometer 1 minute per division; spirit-level vial sensitivi type 0.003/10.000 in. Per division; accuracy 1.50 minutes; drum is graduated in minutes and figured every 5 minutes
