That's just crazy. I can't imagine being that precise.
My brother in law makes military jet parts. Some of that stuff is pretty wild too. I don't think he would want to use Stone's tape measure or even my old Stanley for that matter.
Give up, Stone. It's been explained to you several times by several people. Your measurement appears inaccurate, BTW. You should measure from the front of the lensboard -without the lens - to the inside surface of the GG. This measurement would giive you the flange focus, not the focal length. You need to look up and understand the difference between these two terms, you will then be less confused. Drew might refresh his memory as well...
I routinely make parts for watches, a very common job is a new balance staff - the 'axle' of the balance. In a fine pocket watch, the pivots of the staff will be in the neighborhood of .0025" -roughly the diameter of a human hair or a bit less, and made of steel that is tempered just this side of glass hard - it's pointless to measure them, you polish the pivot to final size, where it fits in the jewel hole with freedom but no play.
Have you ever worked on Diesel engine injectors? Handle the injector piston, it warms up a bit and will not go into the bore in the injector body. Hold the injector body in your hand to warm it, pick up the cool piston and it slides right in.
I cannot and will not comment on Stone's own measurements.
I'm pretty sure those vary a lot depending on if he is shooting landscapes or nudes....
You carry a pocket watch? Isn't that a bit old fashioned? Next you will be telling me that you shoot film with one of those old cameras with the bellows and ground glass. When I started in sheet metal as an apprentice, my foreman used to yell, "Hurry up, we're not building a watch!".
No I have never worked on Diesel engines. That's some pretty close tolerances on those injector bodies. I did a 3 angle valve job on a slant 6 gas engine once. I haven't done much machine work.
Yes indeedy. A Waltham 16s, 23 jewel Vanguard - their top of the line RR watch, adjusted to heat, cold, isochronism, and five positions, with gold jewel settings, gold second wheel, diamond endstones, and a double-sunk vitreous enamel dial. You wind it every morning. It was made the year the Titanic had that encounter with the iceberg, and if I carry it carefully it runs within 30-40 seconds/month. And I have several of them old "box cameras".
Edit - This model Waltham, almost - the regulator is different - http://www.ebay.com/itm/STUNNING-23...7115332?pt=Pocket_Watches&hash=item3cda1917c4
I really wish the front looked as good as the back.. It's so pretty in the back but the front is so blah, why have all that gold if it's hidden, at least the hands and numbers could have been gold. But still an amazing timepiece. Thanks for sharing.
Stone, it's a railroad watch. The dial is designed for one purpose, ease of reading. The timekeeping commision had fairly strict standards. Gold hands and numerals? Please. I wouldn't own it if it looked like that.
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