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Re:Spanish traders set the standard for GnuCash database design by benj111 on Tuesday June 09, 2026 @05:11AM (#48458598)
The guinea was also seen as posher. So guineas were used as a social indicator
Re:Spanish traders set the standard for GnuCash database design by gus_massa on Tuesday June 09, 2026 @09:28AM (#48460880)
I agree.

[Time sink warning] [Fractions warning]

There is an interesting video by Lindybeige that explains the old British coin system. The part about the guinea is at minute 42, and in particular explains why it was worth 21 instead of 20.

https://youtube.com/watch?v=R2paSGQRwvo