They came with different spoke counts as far as I know, the top spec 12 HPW ones with ti internals had 12 spokes front and rear.
I've got some of the tubular Shamals that are 16 spoke front and 16 spoke rear. I don't about 20 and 24 hole versions though. I would have guessed some of the lesser spec Campag wheelsets had more spokes, original Vento's maybe? I've got some Campag Atlanta 96's that are 32 spokes on each wheel, so know Campag did a range of deep silver rims, though in truth the Atlanta's are not as deep as the Shamal's, more like 35m deep.
Show us more detailed pics of the hubs, the original Shamal ones are famously bulbous and look like this...
View attachment 653117
And here's a Shamal front hub
View attachment 653118
Your hubs look wrong, both look like they have more spoke holes than it has spokes which is not right, so suspect your set is some random hubs build up with deep rims but more pics of the hubs will reveal more hopefully.