On the subject of how rules differ between versions...
OD&D/LBBs - the spell "Cure Light Wounds" heals d6+1 same for potion.
AD&D/1e - the spell "Cure Light Wounds" heals d8 (no +1 pip), but the potion is 2d4+2!
OD&D/LBBs - natural healing is every other day (even days), complete rest required.
AD&D/1e - natural healing every day, complete rest required. CON factors into this (penalties always, bonuses after 1st wk).
Gets me EVERY TIME I switch games!
@chgowiz My moments are actions in combat. For some reason, the spells and potions I remember. LOL
As for natural healing, 5e is easy and I houserule the old editions, having characters regain hp equal to level for a night's rest.