Heuer Monza Reference 150.501?

C coldcoffee

Hello - I have been trying to find this version of the Monza

I have seen it at the following places

https://www.roadandtrack.com/car-cu...ograph-celebrated-ferraris-greatest-comeback/

https://www.lot-art.com/auction-lot...3665-heuer_monza_chronograph-08.5.21-catawiki

And also on George Bamford's wrist in about effing time podcast (4:25)

But cannot find it or it's reference anywhere.

I can find the economy version (without the monza on the dial) 150.501 quite regularly but the one with monza on top of the Heuer logo and the balanced chrono registers seems to not even exist on

http://www.onthedash.com/watches/monza/

Any idea of what this model is? Was it a transitional reference between the economy version and the Niki Lauda version?

Appreciate the help!

C coldcoffee

The weird thing is all case backs I have seen for the symmetric dials says 150.501 on the back

Example: https://www.chrono24.sg/heuer/heuer-monza-ref110501-pvd--id25382002.htm

So there are three versions
1. Symmetric without Monza dial (110.511/110.501?)
2. Symmetric with Monza on dial
3. Asymmetric Dial (150.501)

Any idea what was the transition from one to the other and why? Was it just the cheaper caliber 15 movement?

Mspeedster

If you look closely at the 1978 catalogue image I shared above, 110.511 does indeed have "Monza" above the Heuer logo.

I think what happened is in later years Monza was removed from ref 110.511 and 110.501.

Here in the 1981 catalogue, it does not have "Monza". Don't know exactly when the change happened, but it seems earlier versions from the '70s should have Monza, while in the '80s it doesn't.

Don't know why the caseback you shared in the C24 listing has 150.501 either, perhaps it was swapped?

Based on the catalogues I shared, there are 4 versions as follows:

1. Asymmetric dial - black case, Cal 15 (ref 150.501)
2. Asymmetric dial - metal case, Cal 15 (ref 150.511)
3. Symmetric dial - black case, Cal 12 (ref 110.511)
4. Symmetric dial - metal case, Cal 12 (ref 110.501)

Oddly, the suffixes (511 & 501) are reversed in their meaning of black case vs. metal case on the 110 compared to the 150. OnTheDash believes this may have been an error in the '78 catalog, see this link: http://www.onthedash.com/chronograph/monza-caliber-12-in-black-coated-case/
But in the '78, '81, and '83 catalogues that I have copies of, they all use the same reference numbers consistently: 110.511 for black, 110.501 for metal.

In addition, the symmetric dial Cal 12 came after the asymmetric Cal 15. The asymmetric dial Cal 15 was released in '76, and appears in the '77 & '78 catalogues. The symmetric dial Cal 12, doesn't appear until the '78 catalogue.

Mspeedster

If you look closely at the 1978 catalogue image I shared above, 110.511 does indeed have "Monza" above the Heuer logo.

I think what happened is in later years Monza was removed from ref 110.511 and 110.501.

Here in the 1981 catalogue, it does not have "Monza". Don't know exactly when the change happened, but it seems earlier versions from the '70s should have Monza, while in the '80s it doesn't.

Don't know why the caseback you shared in the C24 listing has 150.501 either, perhaps it was swapped?

Based on the catalogues I shared, there are 4 versions as follows:

1. Asymmetric dial - black case, Cal 15 (ref 150.501)
2. Asymmetric dial - metal case, Cal 15 (ref 150.511)
3. Symmetric dial - black case, Cal 12 (ref 110.511)
4. Symmetric dial - metal case, Cal 12 (ref 110.501)

Oddly, the suffixes (511 & 501) are reversed in their meaning of black case vs. metal case on the 110 compared to the 150. OnTheDash believes this may have been an error in the '78 catalog, see this link: http://www.onthedash.com/chronograph/monza-caliber-12-in-black-coated-case/
But in the '78, '81, and '83 catalogues that I have copies of, they all use the same reference numbers consistently: 110.511 for black, 110.501 for metal.

In addition, the symmetric dial Cal 12 came after the asymmetric Cal 15. The asymmetric dial Cal 15 was released in '76, and appears in the '77 & '78 catalogues. The symmetric dial Cal 12, doesn't appear until the '78 catalogue.

abrod520

Remember though, most watch catalogs back in those days (including this one) use an artist's drawn image of the watch that is usually based on prototypes or mock-ups. We've seen 'mystery' Speedmasters like this for instance, that don't actually exist. And in this case, I've never personally seen a Cal 12 with the 'Monza' name above the Heuer shield... not saying they don't exist, but if they do, they must be extremely rare and none have been photographed or documented as far as I'm aware

C coldcoffee

Thanks! The weird thing is that almost all Symmetric dial versions I can find on the web have 150.501 on the case back

https://www.chrono24.sg/heuer/heuer-monza-ref-150501--id27277167.htm

https://www.chrono24.sg/heuer/heuer-monza-ref110501-pvd--id25382002.htm

https://www.chrono24.sg/heuer/heuer-monza--id25244963.htm

https://www.carousell.sg/p/heuer-monza-150-501-vintage-rare-1106933147/