My understanding is 525 was an HRC only program, and not commercially available.

I only know of 000 [the original HRC card], 010 [dry], 020 [wet], and 030 [all-purpose/superseded 010/020] cards that physically exist.

Other than aesthetics, it's all irrelevant, as any program can be written to any card. The Jha card was just a stock card with a Jha sticker on it and an HRC program, for example.
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Andy.
NSR-WORLD.COM

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