I can't find any record of C-GOBH ever assigned to a 3-holer
JP fleets 1979 - Quebecair
C-GQBE B.727-25 cn 18970
C-GQBH B.727-123B c/n 1650 (they also had another -100 on their fleetlist)
Sometimes Q's and D's marked on aircraft mimic O's
FYI - Found a listing showing c/n 18970 listed as " OBE " but it seems to be an error or mistype..
199509AB-N PK-VBA Boeing 727-25 18970 N680AM N680FM N682FM CGOBE N8146N Transindo tbd 9 1992 1998JAW 199509AB-N
Hope this helps
John