I am looking for any pictures of Cessna N4750F or possibly N475DF when it was a fire spotter with the Calif Dept of Forestry or any Cessna O-2A in fire spotter paint also any pictures of any OV-1 Mohawk in geological survey service I have found out that CDF purchased 20 0-2 aircraft from Davis-Monthan air base in 1976 the registration numbers are as follows N454DF, N455DF, N455DA, N456DF, N460DF, N463DF thru N475DF, N7200B, N468DE & N67136 so any pictures of any of these aircraft in their CDF livery would help