select distinct substring(name,1,1) from stamps ,color_master where color_master.color_code=stamps.color_code and color_master.color='Blue Grey and Monastral Blue' and stamps.serial_no='0518' and year(stamps.issue_date)=1967 order by substring(name,1,1)
IndianPost
Color >> Blue Grey and Monastral Blue >> Serial Number >> 0518 >> Issue Date >> year >> 1967 >> Alpha >> D >>