1950s Camp Pendleton, Voice-o-Graph, Drunk Soldiers, Voice Recording to a Sweetheart back Home (OD-A056)
 
This is a Voice-O-Graph record. It was recorded on September 13, 1954 near Camp Pendleton, California. The guys in the recording must be on leave and perhaps a bit tipsy. The record was sent back home to a sweetheart. It is such a unique piece of history. 
Introduced in the 1940s, the Voice-O-Graph recorded customers live to a 6-inch vinyl record, lathe-cut right on the spot. For 35 cents (roughly $4 today), people crammed into a wooden vocal booth, recorded themselves for three minutes and 10 seconds, and then watched a record drop out a slot like a pack of gum. This is a featured scene in one of my favorite movies, "UP IN ARMS".
Origin:
Voice-O-Graph machines were coin-operated recording booths, similar to photo booths, that allowed individuals to record their own voices onto a lacquer-coated disc. 
Purpose:
These records were primarily used for sending personalized audio messages, often referred to as "talking letters," particularly popular during eras like World War II for soldiers to communicate with loved ones. 
Features:
The disc in the image is explicitly labeled "Voice-O-Graph" and includes details like "CAUTION INFLAMMABLE" and "MADE IN U.S.A. BY INTERNATIONAL MUTOSCOPE CORPORATION, NEW YORK," which was a prominent manufacturer of these machines.