Heuer 2447 Valjoux 72 Question

Hi all

After a very long search process, I'm close to purchasing a first execution Heuer 2447N. However, I have a question on the Valjoux 72 movement for the community. The balance cock area in the movement appears to be unmarked, while all pictures I can find online are marked with 'plus' and 'minus' symbols. Has anyone seen an unmarked balance cock in a Carreras Valjoux 72 movement? I'm wondering if is a sign of replace parts or a pieced together movement (though the rest of the movement looks good to my eye).

Here's a link to a 2447 with the balance cock markings: https://www.hashtagwatchco.com/prod...nless-steel-chronograph-valjoux-72-wristwatch

Thanks all - appreciate the help.

Thanks for the response. Since posting this I spent quite a while digging around on the internet and I've found around 15 or so listings of 2447s without these markings. Curious as almost all have the markings as you mentioned. I'm wondering if these were replaced at some point or if some of these movements simply came without markings - having found this many examples online, I'm more inclined to say that they left the factory like this.


Here are a few links I found:
https://www.shucktheoyster.com/portfolio/heuer-carrera-vintage-chronograph-2447n-3/

https://www.hqmilton.com/timepieces/83yrl804/heuer-carrera-2447-s-A2173

https://www.calibre11.com/vintage-heuer-carrera-2447nt/

https://www.craftandtailored.com/products/1966-heuer-carrera-12-ref-2447s-1

Lack of.markings is not unheard for that, so if everything else checks out I would not be concerned.

That's the conclusion I've come to as well. Thanks very much for the response.