I recently acquired this vintage Titus 100 ATU dive watch. I am not so familiar with this model which has a depth rating of 1000m. The watch is in good condition and has a large 42mm case. The neon orange dial with yellow outer ring is quite attractive. This particular watch design came out also in different brands like Bulova, Eberhard, Elgin, etc...

 

Wow, very neat. I didn't know Titus made an orange one, but I also shouldn't be surprised.

 

That's a nice one. First time I've seen that particular dial.

 

Well I guess at great depths, they need a watch with a bright colored dial for better visibility.

 

That is a common fallacy, and I think that Doxa and other makers used that notion as a marketing tool. In fact, colors become increasingly muted at deeper depths. Red and orange are the first colors to disappear as you go deeper, so it's fairly pointless to make an orange dial.

 

Thanks for the info Dan. What about the Heuer dive watch where the whole dial glows in the dark? I had one before and I’m pretty sure it was effective specially for night diving.

 

Congratulations, I like to see the dial under UV light.

 

Absolutely, luminescent dials are very effective. And an orange dial is certainly no worse than any other color, it's just that the color really won't be visible at any significant depth. I used to do a lot of spearfishing and I recall my initial surprise at the fact that red snappers look completely silver once you are down below 50 feet or so. The red and orange light just doesn't penetrate very far.

 

Very interesting.