What is this

[se3388]

This is posted on another Forum I frequent and we are having a time identifying it. Any ideas here?

Steve.........

[Papaw]

Marking gauge

https://www.google.com/search?q=Marking+gauge&rlz=1C1CHBF_enUS758US758&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjsjqumo4DYAhUC0IMKHYvYDiMQ_AUICygC&biw=1600&bih=769

[se3388]

Best idea so far. It does have some similar characteristics.

Steve.........

[p_toad]

I agree.   Looks like the stop simply slides in and out of those slots at fixed intervals and the cutter/marking pin is missing from the divided end.

[bill300d]

I am seeing a part possibly to a scale

[oldgoaly]

Could be part of a old 1900 steam boiler safety valve. it was hinged on one end, then the weight could be moved for the proper pop-off pressure. They were mostly made of brass also.