Peru Cusco Solar Observatory Of The Incas Stamp June 7, 2024FarhanCountries and Territories, Flora and Fauna, Historical Events and Personalities, Peru, Special Collections and Events, Special Releases, stampAdd comment Issue: Peru Cusco Solar Observatory Of The Incas Stamp Type: Stamp Number of Stamps: 1 Stamps Denomination: 4.60 S Issue Date: 1966 Issued By: Peru Post