Watch List notes:

(g) Saudi Arabia, Abd Al-Aziz (1926-53), gold 4-Pounds, Philadelphia mint, undated (1945-46), eagle seal of the Philadelphia mint, rev. weight and purity in three lines (KM 34; Fr.190), about extremely fine, scarce.
Struck for Aramco in the United States for concession payments to the Saudi government in exchange for oil.
Estimate: £1400 - £1800