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Just to clarify something about the stopwatch that has the "Brevete S.G.D.G" markings - The stopwatch starts when you first press the button located at the 60 second mark. Then when you press it the second time nothing happens and the stopwatch keeps ticking.
Recently acquired an Elgin stopwatch I have never seen before. The way the dial is marked it for timing a 5 mile run at between 120 and 500 miles an hour ?? It reaches the 30 mark (times 10=300) on the dial in 1 minute which as it states on the dial if you did a 5 mile run in one minute you...
I have this 30-second Swiss timer that has Lean & Jones Inc. on the case and movement. Does anyone have an instruction manual or original box for such a watch? The plastic crystal has a blue tint to it, is this common. Thanks, Brad Maisto, KY Floral #44 Secretary P. S. Does anyone know about when these were produced or sold to the public?
The serial number of this Jerome Park stopwatch is 151*** and on the movement it has the words "PAT. APLD. FOR" which suggests that the date for the manufacture of this particular stopwatch or Horse Timer is in 1891 Below is the Swiss patent No. 3071 granted on 30th January 1891 to Ferdinand Bourquin
This little beauty recently came into the shop for repair, as far as I can make out its an Anti-submarine stopwatch. Under the serial number database its described as a military timer. I have a couple of technical queries; First the balance is running at a very fast rate, at first glance...
Here are a couple of pics, the movement serial number is 4,118,152 and I am also showing the stamp on the inside of the case back. This case back at least snapped back reasonably easy, unlike the timer I bought two years ago in which I still have not secured the case back. Anyone out there had luck correcting hair Springs like this?
It is actually a ground navigation timer not a bomb timer. When flying over the ground you would start the timer at a known landmark then stop it at another some distance away. You can determine your ground speed that way. I have two A-8's. One was my father in laws who was an aircraft navigator and retired as a ltcol from the Air Force.
Last week I posted a photo of what I thought may be a very unusual vintage Gallet Timer. It was an "Hour Decimal" stopwatch that a full revolution of the sweep hand takes only 36 seconds. [Representing one hundredth [.010] of an hour. [Or, 6/10 (.6) of a minute]. It's sub dial is divided...
I am trying to find the pendulum length for the No. 102 wall clock with the 113b movement. I am having trouble finding any information or even any images of this clock. I need to know how long the pendulum is. It was a hook pendulum. Any help would be appreciated.
Jon and I rarely disagree, but in my terminology, a watch without normal time functions is called a "Timer." A watch with both time and chronograph functions is called a "Chronograph." The term stopwatch is used haphazardly for both forms. These two examples illustrate the difference.