Mobile DTE24 is ISO 32 viscosity and is sold primarily as a hydraulic oil. Pretty much any premium hydraulic oil with anti-wear additives should be fine. Modern oils are much better than what was around when the machine was made so exact specification is not so important. Anything good and close will do, especially in the home shop where the machine will be relatively lightly used.
Genrally supply issues determine the choice as most of us can't pop down the shop and buy a can off the shelf. I use Castrol Hyspin AWS 32 as my general purpose machine oil and Castrol Magna BD 68 as way / heavy duty bearing oil primarily because RS Components stock them and do reliable, fast, delivery via credit card order at acceptable prices. BD68 is also a wonderful oil-can oil for hinges etc.
Clive