Looks ok to me. I really like these, it's the combination of black and red that does it for me (being an 80s teenager probably has a lot to answer for!!). Not a Monza expert, but all the hands look right too, which isn't always the case...

Here's the model from a 1978 catalogue:

The subdials are different because it is indeed a Cal 12, so there is no perpetual seconds register, unlike the Cal 15 Monzas that have this at 10 o'clock. A 110.501 looks pretty much the same but just has the Heuer shield on the dial, no Monza wording.

We had a discussion over the Monza's relative lack of popularity quite recently, following Arno's posting of a pic of his Cal 15 example:

http://www.chronocentric.com/forums/heuer/index.cgi?read=27429

Underappreciated probably means undervalued, though, so you may be able to pick up a Monza bargain compared to some of the other models - not sure they made all that many, though, and the lifecycle wasn't the longest so restricted supply probably keeps the prices high enough that there aren't any real out-and-out bargains to be had.

Definitely a nicer watch than the (unrelated) Tag-Heuer Monzas that first drew you to the site though, wouldn't you agree? ;)