When did PTP start using MicroMag vavles?

[Target]

When did Pro Team Products start using MicroMag logo'd valves with their guns?
(or did they always have the MicroMag logo on them if purchased as a complete marker?

I have MicroMag valve GFX000160 . What year would this be approx?

Dan

[Tunaman]

Probably the 160th Micromag Made...I believe the serial numbers were in order. Pretty old, but still rockin' I bet...