Panasonic separately names ES8243AA for WES9020PC and WES9161CL. The set and outer foil have separate exact US sources; no other ARC4 model is inferred.
Panasonic · exact-code ledger
ARC4 ES8243 system
Selected model rows from the cited manufacturer sources. This manually selected list is not an exhaustive catalog or a complete family enumeration.
Exact model list
1 model code retained.
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PanasonicES8243AA
WES9020PC · WES9161CLDirect manufacturer enumeration
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Manufacturer evidence
Sources used for this system.
- Panasonic — ARC4 ES8243 system compatibility evidenceOpen manufacturer source
- Panasonic US — WES9161CL outer foil and exact modelOpen manufacturer source