Starrett BostoMatic 644, 640-431-S Depth Indicator. Indicator is pre-owned older model in good overall condition with no etchings.
Appears to be a rare variant, potentially made for/with BostoMatic. Does not come with accessories. Lightly cleaned and inspected, works smoothly with good repeatability. Please review photos carefully for condition and identification. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Metalworking Inspection & Measurement\Indicators".
The seller is "qualitytradeco" and is located in this country: US. This item can be shipped to United States.