So awesome. Did I miss the ash pan specification for 1976-1977 in your write up?
"The modern Weber wheel. 6″ in diameter. Found on Weber charcoal kettles 1977 and newer."The 18.5" my dad bought new has those too, with a Bar-B-Kettle, not Weber, lid vent. Maybe just the 18s were called Bar-B-Kettle?