WWII B-29 Super Fortress Navigation Clock

AN 574-1 MFRS PART NO. E-37500 CONTRACT NX s 1301 MFRS. SER. NO 003055 ELGIN NATIONAL WATCH CO. The clock keeps perfect time, the second hand works, the elapsed time works, the civil date works. The stop watch part works however when the second hand makes a complete sweep, the minute hand does not move. In total it is a 8 day, 5 function clock that was used for navigation. Would like to know Value and I am willing to sell clock.

Fair