M-210 Message Pad
The M-210 message book, part number 6D2107-210,
is an M-209 accessory. It is listed in TM 11-380, dated 17 March 1944.
This book is used to record messages from any source and save a carbon
copy of the message in the book when the original is removed and given
to the intended recipient. At the back of the book, there is some
extremely thin paper as well as regular message paper. It is believed that
the thin paper was used with carrier pigeons. Yes, carrier pigeons were
used by the US Army to transport messages.
