It's not a PP-1100A or PP-1200A, it's an Astec SA40-1304. Used on Single PC10, Countertop PC10 & Red Tent PC10 conversion kit.
https://www.arcadepartsandrepair.com/store/rebuild-kits/power-supply-rebuild-cap-kit/atari-astec-sa40-1304-power-supply-cap-kit-including-2-filter-caps-105c-nichicon/