grober
MB Master
Have you checked the date stamp on the wheels yet? It might help clarify matters? Who actually supplied the replacement tyre which you fear might have been lost ? There is also a date stamp on the tyre sidewall to indicate when it was made [ week and year]. Reputable tyre companies normally fit tyres less than 6 months old. This might help to pin down the origin of the remaining "Good Year efficient grip" tyre--I'm not sure if you "lost " the original or replacement [post puncture] "Good Year efficient grip"?