Voice Records were small aluminium phonograph discs, intended to be used to record a personal message.
They were introduced in the 1930s in the UK, to be recorded in automatic booths operated by the Amusement Equipment Co. Ltd. of Wembley. The booths were placed in places were people might want to record a message to family or friends, such as tourist attractions.
The discs were 5-inches in diameter, span at 78rpm, and were double-sided with one side for recording up to one minute of a personal message and the other containing a pre-recorded advertisement (often for cigarettes, but sometimes promoting attractions local to the machine). The discs came with a mailing envelope for posting the recorded message and some wooden needles, since the steel needles used at the time on phonographs would damage the recording.
This most likely the system Graham Greene had in mind when writing Brighton Rock (1938) when Pinkie records his message to Rose.
The machines were withdrawn from service during World War II, when supplies of aluminium were needed for military use. It is probable that many Voice Records were donated as scrap for the war effort.
The Voice-O-Graph was a very similar later concept, but used laminated cardboard.