It is a rare day that I do not see "something new" in this hobby and today is no exception!
Your number 4094049 appears to be a from a run consisting of 4093701-4094600 which should be 16-size, Pendant-Set, Open-Face, 21-Jewels, Model 7, Grade 606 from 1922 production. According to the late Bill Meggers on page 140 of the Illinois Encyclopedia the Grade 606 came in both 19 and 21-Jewel versions. They came Adjusted 3 Positions and fronted Double-Sunk glass enamel dials.
Production of the Grade 606 began in 1912 at number 2415001 and 4811000 would be the last in 1927 production. Meggers believed there were a mere 530 of the 19-jewel hunters, just over 2,000 19-jewel open face, more than 4,700 of the 21-jewel hunters and nearly 8,000 of the 21-jewel open face examples. He further reports the 606 was a "medium quality grade" and many were "Stewart" private labeled which was a trademark of the Sproehnle Company of Chicago, Illinois.
Someone else may recognize the "21 Special" as it is a new and interesting label to me.
thanks tom and lindell, this is the 3rd of this style movement ive gotten in the last 5 weeks.all the same except one says capitol one says 21 special and one is plain.other than that they are all the same.