Tool ID

This crimper is stamped:

AMP Type O
16-14
59498

16-14 is likely the wire gauge but the jaws are about 3/8" diameter, a little big for that wire gauge.

Maybe it's for O gage and 16-14 is the tool number. Or maybe it came with a diffent set of dies than what is currently installed.

You’re thinkIng electrical wire or steel rope?

Good point. Could very well be for steel ropè.

The brand name AMP suggests electrical.

I'm thinking it's got a different set of dies in it.

Agree that Amp is very big in electrical connectors and crimpers. I think it was sold as a 16-14 crimper and has had the dies changed since then.

Yep it is an Amp brand conductor terminal crimp tool. Should have different interchangeable dies for different size conductors.

The "O" die is for distribution electrical connectors, typically H-taps. Probably #1 stranded aluminum to #6 solid copper to feed a transformer.

Possibly AWG Electrical wire. AWG # 0 (1/0) Diameter 0.3249”
Ron

I had used several different amp crimpers over the years as a lineman. Some have changeable dies others don't.
The O is a common size used on most house service sleeves. We had sleeves from #6 to #1/0 that used the same die. I believe O is 5/8. They make what we call an O D tool that had 1 fixed opening O and one that take dies. Meaning fixed O and die’s. Also called a one shot. We found a couple that had a 9/16 fixed instead of the 5/8 too.
Depending on who's sleeves your using you sometimes need a different die for the same size wire.
Most new crimper's are either ratchet, hydraulic, battery-operated and insulated.

Those were dangerous on live wire with the long metal handles.