Seamaster Cosmic 66022-TOOL 105

This watch was passed down to me by a late great uncle. Marked 66022-TOOL 105 on the back. Hoping someone can give me anymore info.

I had the watchmaker open it up when they polished the crystal but they said there was no serial numbers to be found on the inside.

Is it possible to help me date it?

Also the hour and minute hands have small tips that glow in the dark. Not sure if it’s radium or post radium.

The watch seems to be in great shape and I love the look.
Any info you can give me will be appreciated, thanks!

Just so you know, the plating on the back has worn away the first digit of the reference number. It would have read 166.022

Plugging that into the Omega database (with the extra zero the database requires) yields the following:

You need a new watchmaker.