sight & fore-sight for easy and accurate alignment of staves, very sensitive bubble of 40 sec. accuracy and 8 minutes sensitive circular bubble is built in the tribrach for quick primary setting of the instrument. All  the movable parts including axis set & foot screws are made of gun metal & brass. The tilting drum graduated to read 1:5000, is incorporated for finer adjustment and accuracy. The instrument is supplied with all accessories in wooden box with seasoned

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