Could it possibly be Corryton Pink? It looks very similar to the one in my garden, and the measurements seem about right. Not sure about the bloom time though; mine here in Minnesota finished about a week ago (first season in my garden).
"Sometimes I've believed as many as six impossible things before breakfast." - Lewis Carroll
Name: Joy Wooldridge Kalama, Wa. (Zone 8b) Sunset Zone 6, Heat zone 4,
I grow both Persian market and corryon pink. Your bloom reminds me more of the later. Is it new to your garden? I ask, because sometimes they'll bloom at a different Time than they should after being moved. My corryton pink is a midbloomer.
No two gardens are the same. No two days are the same in one garden. ~Hugh Johnson