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Hi All,

I recently bought a few gauges on Ebay. One of those was my actual target, a roller jewel gauge. Pictured below was one of the other gauges I received. From what I gather, this one is for measuring pivots. No sure if I'm right here. A confirmation of my assumption would be great. The gauge also has an abbreviation of "DEN". I have looked around and don't find this relative to watchmaking. Any clue to what this abbreviation means?

Thanks,

Don

IMG_20240514_161818623.jpg

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Could it be an abbreviation for Denier?

"Denier (/ˈdɛniər/) or den (abbreviated D), a unit of measure for the linear mass density of fibers, is the mass in grams per 9,000 metres of the fiber. The denier is based on a natural reference: a single strand of silk is approximately one denier; a 9,000-metre strand of silk weighs about one gram."

The pivot gauge looks interesting, however I wouldn't trust myself to drive a pivot into a wedge incase it jams and gets damaged/snaps trying to get it free.

More a comment on my ability and incompetence than the quality or design of the tool 🤣

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7 hours ago, dhall said:

Hi All,

I recently bought a few gauges on Ebay. One of those was my actual target, a roller jewel gauge. Pictured below was one of the other gauges I received. From what I gather, this one is for measuring pivots. No sure if I'm right here. A confirmation of my assumption would be great. The gauge also has an abbreviation of "DEN". I have looked around and don't find this relative to watchmaking. Any clue to what this abbreviation means?

Thanks,

Don

IMG_20240514_161818623.jpg

Den / Dennison is a unit measurement of size this is actually a mainspring gauge . I haven't heard of a pivot been measured in Dennison before.  Though the small thickness gauge is  usually supplied with a Jacot tool and is more accurately known as a pivot destroyer.

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25 minutes ago, RichardHarris123 said:

Maybe we should start a  thread on obscure units of measurement. 

I used to have a lecturer during my Engineering classes who was always beating a drum about quoting units, I remember one day he was so exasperated with our class he said "quote your units!!!!...I don't care what units JUST QUOTE THEM!!!"

My next assignment I calculated the velocity and quoted the units, something along the lines of: "Thus the velocity of the body will be 0.00345 furlongs per fortnight"

He graded my work as an F, then crossed it out and gave me an A+, turns out he had a sense of humor after all.

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Posted (edited)

The more I get into this hobby. The more I am amazed at the standard of those preceding. Amazing people and amazing skills. We wear their history on our wrists.

Edited by rossjackson01
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3 hours ago, Waggy said:

Thus the velocity of the body will be 0.00345 furlongs per fortnight"

That sounds like the running distance of a horse I bet on 2 years ago, I'm still waiting for the phone call to let me know its crossed the finish line. 

20 minutes ago, rossjackson01 said:

The more I get into this hobby. The more I am amazed at the standard of those preceding. Amazing people and amazing skills. We wear their history on our wrists.

Elegantly put Ross and yes we do .

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