02-08-2021, 01:55 AM
It looks to me to be an older form of a "Trav-a-dial" that measures the distance the carriage travels using a rubber contact wheel against the front of the bed.
https://www.maskinisten.net/viewtopic.ph...2&start=15
https://www.maskinisten.net/viewtopic.ph...2&start=15
Willie