The results reported reflect the work undertaken to extend the life of San Bartolome processing facility and create value for stakeholders. While Andean has been processing ore from both its internal pallacos and third-party contracted material, the percentage of the contracted material has steadily increased. 2023 MR&RE for San Bartolome reports: a contained M&I silver ("Ag") resource of 19.0 Moz at 98 grams per tonne ("g/t") Ag; and a recoverable 2P reserve of 11.95 Moz with an average grade of 93 g/t Ag.

New sources of mill feed acquired - including high-grade silver oxides from Paca, Alta Vista and three deposits in the Tollojchi area - will augment FDF production. Potential opportunities remain to further expand the life of operations by upgrading portions of the high-grade inferred, which stands at 965 kt grading 167 g/t Ag. The Company has an active program to identify and acquire new oxidized materials that would otherwise not be suitable for processing with typical flotation plants in the country.

Mineral Resource Estimate Methodology - FDF. personnel from Empresa Minera Manquiri SA ("Manquiri"), the wholly owned, Bolivian subsidiary of Andean, logged and sampled the drill core and submitted the samples to ALS Global's ("ALS") sample preparation and analytical facilities in Oruro, Bolivia and Lima, Peru, respectively. ALS is a certified commercial analytical services company.

SRK completed an analysis of the raw exploration data, analysis of outliers and defined capping levels where necessary and composited the samples to a 2 meter (m), consistent vertical length. Variogram analysis was completed to define the block size, search strategy used in the estimation. Manquiri and SRK completed the geological model and the resource estimation for the oxidized material in the three areas of Tollojchi (Platera, Manto and Rosario), Alta Vista and Paca, and included the partially oxidized (transition) material in Paca.

Monthly mine schedules for the life of the project. Cost model verification based on new mine schedule and inventory.