Question to a watchmaker, water resistance of my vintage GMT

[Montrealer]

Maybe someone could chime in and help me shed some light on some the water resistance test that was performed on my vintage 1967 GMT Master.

As part of the service, the following data was provided from tests performed with an Elma-Spheric tester.

Test pressure: -0.4 bar
Maximum deformation: -22.85 um
Tightness value: -0.2%/min
Test 1: OK

Test pressure: +3.0 bar
Maximum deformation: +201.85 um
Tightness value: +1.9%/min
Test 1: OK

In layman's terms, what does this tell me about my watch ?

Thanks in advance experts !