The Talking Machine Forum — For All Antique Phonographs & Recordings

Posted: **Mon Dec 30, 2019 5:19 am**

Does anybody know anything about these or where they were made ?
Its nice and clean and has never been used.

Thanks
Stephen

Posted: **Mon Dec 30, 2019 9:41 am**

Probably made from anthracite fines, especially for use on the Lehigh Valley's crack passenger train, the Black Diamond Express. Just a guess....

"Black Diamond" Recording Blank