Didn't the same 'upside down switch' scenario apply to at least one 1-11 on the BEA fleet? It (or they) were different to the rest having been acquired when another airline was merged with BEA?
I seem to remember G-ANCD, one of 4 Britannias in IAS, having the "reversed" switches. It was built originally for Northeast in the USA, but never delivered to them. It was a 307 with a grey flight deck interior and an accident waiting to happen with all those switches.