Vintage 1982 Hamilton GG-W-113 Military Issue Pilot Watch Cal 649 Hack 17 Jewels
This is a Vintage Hamilton Military Watch, model GG-W-113, dated 1982, and in excellent condition considering its age. The dial and hands look incredible to be 38 years old and already very well patina developing. This watch is in excellent condition, running, hacking & keeping time. Hacking mechanism still works fine.
Dial: Original. 26mm (dial only) . Near mint. Unsigned black dial. Military dial with Arabic numerals 1-12 and also 13-24. Tritium luminous, Pumpkin colored markers. Nice patina. Pumpkin tritium is no longer glowing.
Hands: Original. Luminous tritium hands (hydrogen 3). Tritium is glowing. Sweep seconds.
Movement: Original. Just cleaned. 17 jewel manual wind mechanical movement, Swiss made ETA 2750, Hamilton Cal. 649, running perfect, recently cleaned by a watchmaker, hacking function is working. ETA 2750 is marked on the main-plate.
The GG-W-113 was issued to aviators with a Cal. 649 hacking mechanism which stops the second hand from moving, allowing you to more easily start, stop or set the time exactly on the second.
According to what I have read, some GG-W-113 watches have a movement with the H.W. Co. (Hamilton Watch Co) cal 649 signature, some unsigned and some with a very tiny dot on the bridge, about the size of a pencil eraser, and inside of that tiny dot it is micro-signed in very small font ‘Hamilton Watch Company, 17 Jewels, 649’. This watch has the micro-signed movement.
It was very hard for me to find the movement with the bridge ‘micro-signed’ inside the small dot. It seems this 649 may be less common. This watch does have the small dot on the bridge that is micro-signed. I had to use a 10x loupe to read the extraordinarily small signature.
The Cal. 649 has a beat rate of 21,600 BPH, which is faster than most vintage watches of that time which often had beat rates of 18,000 BPH.
The 649 is designed to hold a 36-hour power reserve, however all GG-W-113 watches I have seen that still have original movements have a power reserve about half of the original 36 hour design. In best case situations, they run for 24+ hours without a wind. I personally wore this watch for 1 week and just gave it a wind or two here and there throughout the day and never had an issue running out of reserve power. Be careful to not overwind!
The GG W 113 came with 2 different movements depending on the era, the Cal 649 and 685. The Cal 649 in this watch for sale has 17 jewels, which correctly matches the part number on this watch. This watch for sale is NOT a 7-jewel GG-W-13, but a much nicer 17-Jewel watch. This watch also has the correct part number for GG-W-113’s watches produced from the late 1970’s into the early 1980’s. Watches produced prior to these dates often had a different part number of 92230.
Case: Original. Stainless steel with a parkerized finish to reduce glare and shine from bouncing off of the case. Also antimagnetic. Parkerization made the stainless steel more durable for use in the field under heavy weather and combat conditions. Correct original plain crown. Crown is a little snug against case when winding, but seems to be no problem and has no effect on the watch keeping winding or keeping good time. It is normal to find some wear on original vintage watches however minor wear, unless otherwise noted are extremely minor.
- Width: 33mm not including the crown
- Lug-to-lug: 41mm
- Thick: 10mm
- Lugs: 17 (mm apart)
- This watch was designed to be water resistant & shock resistant, and designed to survive a fall from 4 feet onto a wooden block. However, I have not and would never test these features on any vintage watch.
- Back of the Case
- FED STOCK NO 6645-00-066-4279
- MFG PART NO 39886
- CONT NO GS-OWS-51982
- DATE May 1982
- SERIAL NO 722037