Device to measure shrinkage in motion picture film. Many types are available.
https://www.nfsa.gov.au/sites/default/files/uploads/2010/08/25/krumm-shrinkage-gauge.jpg
Operation of the Krumm film shrinkage gauge
Standard and short pitch
| 35mm | place film over the pins 56 perforations apart, this equals 14 frames. |
| 16mm | place film over the pins 35 perforations apart, this equals 35 frames. |
| Std. 8mm | place film over the pins 70 perforations apart, this equals 70 frames. |
| Super 8mm | place film over the pins 63 perforations apart, this equals 63 frames. |