Not really a proper answer but I've had one of each. The Presto, which I still have, is JIS and also has the smaller hub/axle dimensions.
Thanks. I have a headset in my frame, just don’t want to take it out to measure it if I can avoid it.
@Tijs started
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Not really a proper answer but I've had one of each. The Presto, which I still have, is JIS and also has the smaller hub/axle dimensions.