A booklet was produced to promote GDC Communications. It is assumed that it is similar to other booklets with 10 stamps of the 1 design and a booklet value of $4.00.
An image of this booklet will be added when the information becomes available.
The date inscription on these stamps will be added when the information becomes available.
The serial number inscribed on these stamps is 0173.
It is assumed that these stamps have a face value of 40c.
An image of this stamp will be added when the information becomes available.