SENTINEL MANUFACTURER: Give Master Mold a power action. If your force on the map except for Master Mold is less then 300 points, you may place a character on the map adjacent to Master Mold. The placed character's name must include "Sentinel", it must possess the Robot keyword, and the placed character's point value must be less than or equal to the current number on the Factory Dial.

Assume a Sentinel that meets all other requirements has 200/100 point values. Can that Sentinel be played at 100 for this ability or only at 200?

Back when MM came out there were no split dials, best i remember, except on colossals. Nowadays if you start on a lower point value, its like REV days, not a veteran fighter but kinda experienced. So yes start them where you want, its one of my all-time fave colossals! Keep building sentinels, the mutants are overrunning us!

I stand corrected, chaos war, the set after galactic guardians, had a sentinel and ultron drone with split dials, wow, i didnt remember that!

It would come in at it's highest point value allowed by the Factory Dial at the time.