Does anyone know how many of these were made?

There is no record information about production available from the mints nor IGT/Anchor gaming.

What is the value?

It has been a highly prised strike for many years. They have sold from $50 to $600. I would suggest getting a CURRENT strike catalogue.
www.artbecker.com

Would this be considered, the grand daddy of

$10 Las Vegas Silver strikes?

This is an interesting question. I presume you mean was it the first Las Vegas $ 10 silver strike. I've never heard this question posed before. It is commonly accepted the $7 strike series from Harvey's were the first issue of strikes. There is no doubt is was early on in strike releases.

Tom