The Sorting Of The 10 Pounds Begins

Obverse and reverse with the security grooves, Brunswick zone If you look in the center of the reverse there is a number or letter grouping this is the code for the location of the machine.






The slotted security tokens were used mostly in the Chicago area for telephones up to the 30's and 40's The could only be used in the phone in store that had the corresponding spaced bars in the coin slot.
These modern versions are from the RWM (Roger Williams mint)