Just wanted to ask the Bunn Special Experts of the correct Dial and case for this watch. SN 2502456, 18 SZ Bunn Special 23 Jewel pic of the Dial in first post

Anyone have production numbers, varieties ect
that would help me evaluate this watch

Thanks to all

Jeff

And the case Pic

Thanks

Thanks for the info. This does have all the markings , 6 pos, iso, jeweled barrel, 23 ruby jewels, Bunn Special

Best

Jeff

In regard to the dial. The repo dials I have seen are press-sunk not true double sunk. This picture with the bezel and crystal in place make it hard to determine but the "sunk" areas look suspicious to me.............Keith

Illinois 18s hunter movements do not have a whip spring that is one of the ways you can spot the difference.
Frank

It is an interesting movement. The regulator omits the spring because there is no room for it. The balance cock position would make it interfere with the back cover.

I have always thought this was a fun sort of "oops" by the engineering department at Illinois.

Thanks to all for your input and expertise. Now a technical question about the whip spring. Obviously the 18 sz Bunn Hunter omited the whip spring. Did this downgrade it's timekeeping ability. I guess the more approriate question is what difference would the whip make if the case allowed room for it on this model?

Again a big thanks to all for the information you share. That makes this place the best!

Jeff

Jeff,

I do not think it would have any bearing on the watches time keeping ability.. On both models the regulator is moved by turning the adjusting screw left and right. The whip spring holds the regualtor against the adjusting screw..On yours, the regulator has a threaded piece that the adjusting screw goes through.. So it is a direct adjustment by the threads on the screw..No spring needed .. Confused yet?? Both were factory designs and I am sure were tested for time keeping accuracy...........