Not tested on actual rotating equipment but appears to function properly. The item "Vintage Starrett No. 192 Polished Chrome Vibrometer & Dial Indicator Wood Case" is in sale since Monday, October 18, 2021. This item is in the category "Collectibles\Tools, Hardware & Locks\Tools\Machining". The seller is "inst_eng" and is located in Maumee, Ohio.This item can be shipped to United States.