Letter preceding model number for Scubapro 2nd stages

[scubadada]

I'm sure this has been explained before, but, I was wondering about the significance of the various letters preceding the model number of Scubapro 2nd stages. I own a bunch of Rs, Gs, and Ss

A700
C370
D420
G260
R195
S600

Thanks

 

[Wookie]

I thought it had to do with who designed it.

Gustav Dalla Valle designed the G250,

Dean Garraffa designed the D350

 

[buddhasummer]

I thought it had to do with who designed it.

Gustav Dalla Valle designed the G250,

Dean Garraffa designed the D350

That's cool.

 

[scubadada]

I thought it had to do with who designed it.

Gustav Dalla Valle designed the G250,

Dean Garraffa designed the D350

So I wonder who A, C, R, and S are?

Maybe some comments by the regulator regulars, @couv @Luis H @herman @halocline @rsingler ...?

 

[rsingler]

I'm too young to know.
Ask one of them old guys...

 

[scubadada]

I'm too young to know.
Ask one of them old guys...

You and me both

Thought this would be an easy question.

 

[agilis]

The D shaped valve lever in the three old D series?

 

[axxel57]

Correct, the 2nds have been named after their designers:

A - Alberto Belloni
C - Corrado Cominetti
R - Roberto Semeia
D - Doug Toth
G - Dean Garaffa
S - Roberto Semeia

 

[agilis]

Correct, the 2nds have been named after their designers:

A - Alberto Belloni
C - Corrado Cominetti
R - Roberto Semeia
D - Doug Toth
G - Dean Garaffa
S - Roberto Semeia

Interesting. Why no prefix for the 108, 109, and 156?

 

[scubadada]

Interesting. Why no prefix for the 108, 109, and 156?

I've always called my first regulator, bought in 1972, still in operation today, the R109. I don't know about the 108 or the Balanced Adjustable