:sl:
The blue one on the left, showing the Ka'bah, Maqaam Ibrahim and Hateem, is mid 1980's, and the two green ones with Masjid al-Nabawi are early 1970's, and the one on the right commemorates the then expansion of the masjid.
These are all mid 1980's, the top one commemorates the then new direct fast road between Makkah and Madinah.
The next two are Hajj season stamps, with the middle one (slightly damaged) commemorating the days of Tashreeq (11th, 12, 13th of Dhul Hijjah, spent in Mina) of Hajj, and the last wide one commemorates the tawaaf al widaa3 (the farewell tawaaf) of Hajj.
The above are are all Saudi stamps.