Revueltas

[NLewis]

Agreed with Perlnerd. When will we start?

[Davydov]

I'm not familiar with the numbering systems, but with Mozart we already use this format for works which were been renumbered between the 1st and 6th editions of Köchel:

• Allegro in G minor, K.312/590d (Mozart, Wolfgang Amadeus)

Maybe something like that could work for Debussy's old and new numbers?

[vinteuil]

Well, with that, they're two of the same numbering system (in name, at least), as opposed to two different systems entirely.