Perforation Gauge for Bureau Issues sizes 10-15 Transparent black

3-D perforation gauge for measuring stamp perforations, sizes 10-15. Works against mounted stamps in albums and other formerly inaccessible, and hard to measure locations! Quick to use, it fits right to the stamp. Easily, positively identify stamps! Various colors and perf sizes available upon request. This perf gauge is all that we use here at Big Sky Stamps. Fast, easy to see, simple. Transparent black crystal Free First-Class shipping (not tracked) through USPS, tracked shipping available through checkout for a fee. **Gauges are all handmade, in house, in small batches. Please excuse any minor flaws/inconsistencies