[78-L] Approximating 78s age by physical characteristics

[Mark Bardenwerper]

On 3/3/2013 8:22 PM, Harold Aherne wrote:
> I have some French Pathé pressings from as early as 1922 that have run-in grooves; for all I know, they may have been present as soon as Pathé began issuing outside-start discs in 1916.
> In terms of American records, the earliest ones I know of with run-in grooves are some Columbias (and OKehs?) from the autumn of 1930. But in the US, run-in grooves weren't added with any regularity until a few years later: Decca by the summer of 1935, Brunswick/ARC in April/May 1936, Victor in about October 1936.
> -HA
>
Run-in grooves would have been deemed handy before automatics.

-- 
Mark L. Bardenwerper, Sr.

Technology...thoughtfully, responsibly.

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