Item Description

Maker
heuer

type
mens

name
montreal chronograph

REF/CAL
REF.29TAGOLD CAL.12

Material
SS

belt
*There is no logo mark, so it may be an aftermarket leather belt, but it looks old.
*I think the genuine SS buckle is probably from that time.

Drive system
micro rotor automatic winding

Model year
1970s

Case diameter/arm circumference
Approximately 42,2mm

accessories
Tag Heuer Overhaul Details (October 2019) Case that comes with repair completion

condition
Used A+ as an antique
*There are some age-appropriate changes and scratches, but as an antique, it is in very good condition.
Considering its age, it is in a relatively unused condition, and I think it has aged well.
For some reason, many chronographs equipped with CAL.11 or CAL.12 are in good condition.
I guess many of them didn't sell well at the time and were released later.
It is difficult to judge whether or not it has been re-polished, but when I looked at it with a magnifying glass, I did not see any slimy scratch marks, so I think there is a high possibility that it was not re-polished.
The edges are sharp and solid, and the hairline finish is in beautiful condition.
There are no particular scratches on the glass windshield, so it may have been replaced during the manufacturer's overhaul.
The dial has small speckled stains throughout, but they are spread evenly and give the appearance of a dial that was originally finished like this.
I don't think it looks unsightly. This stain doesn't seem to stand out, and I think it's unlikely that it will become unsightly and deteriorate over time.
The luminescence of the dial and hands has faded to some extent, and in dark places the dial will not glow and the hands will glow to some extent. There is a slight difference in color between the luminescence of the hands and the luminescence of the dial.
The hands may have been replaced in an older model, but I don't think there is much difference in appearance.
The leather belt does not have any logo marks, so it may be a third-party product, but it feels old. I think the SS buckle is genuine and probably from that time.


comment
*Glass windshield screw back
*The notation "HEUER-LEONIDAS" can be seen on the inside of the camera back.
"LEONIDAS" is a watch manufacturer founded in 1841.
Even now, I occasionally see antique watches from LEONIDAS.
Heuer and Leonidas merged in 1964.
I'm not sure about the power relationship between the two brands after the merger, but since the word "LEONIDAS" can be seen on the inside of the camera back, I think Leonidas also had a certain amount of influence, although it was led by Heuer. .
*17 stones Earthquake resistant device Smooth temp cam type 21,600 vibrations
*This movement looks like a hand-wound movement because the rotor is not visible, but there is a micro rotor at the back.
Because the movement has a two-story structure, the rotor is no longer visible.
*It does not have a permanent second hand, so it is a three-counter chronograph that can measure up to 12 hours.
*Although it does not have a fast-advance mechanism, the date can be advanced by repeatedly moving the hand forward and backward from around 21:00 to after midnight.
*Equipped with CAL.12 (21,600 vibrations), a minor change version of the world's first self-winding chronograph movement CAL.11 (19,800 vibrations). In addition, CAL.12 seems to have been manufactured since around 1972.
*A quick look into the world's earliest self-winding chronograph movements reveals the following.
The world's first self-winding chronograph movement was announced in March 1969, the two-story CAL.11, jointly developed by Heuer, Breitling, and several other companies.
The world's first self-winding chronograph was released in May 1969, and was equipped with Seiko's CAL.6139. Zenith's 3019PHC (El Primero) seems to have been announced in September 1969, so it may not be the world's first, but it is probably the most impactful movement.
I think it can be said to be the world's first integrated exclusive designed self-winding luxury chronograph movement.

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