We are offering vernier theodolite. watt�s pattern 20 sec. Accuracy size178mm in (black & nickel) fitted with optical plummet and blue optics,horizontal:148mm,vertical:125mm,magnification:26x,field of view:1�20�,all parts made by brass & aluminum, metal axis in teakwood box with aluminum dye casting heavy stand & all accessories packed in waterproof canvas cover.