Omega “Tank Style” 1970s watch

Hi

I was looking to add another vintage Omega to my modest collection and came across this little Tank style watch for £150

it’s showing as a Cal 625 and has a reference of 111.053 I did a check on the Omega website for the reference number but nothing is coming up

there is very little on the internet about this reference apart from an Italian watch forum which had a very similar watch and a listing on Chrono24 for what seemed a ridiculous inflated price where the owner stated that its from the Deville collection

is this correct is this model from the Deville collection and possibly from the 70s ?

it is listed as a midsize watch which is 21mm x 32mm which I know is very small but I know Tank style watches are in and around this size range

If any one knows anything further on this it would be great to know ,

Thank you that is really appreciated

it appears that it might actually be ok and things add up

What a fantastic little snapshot of history !

much appreciated thank you