Lat: 8.0°N, Long: 62.0°E, Diam: 70 km, Depth: km, Rükl 38
Low-albedo crater Firmicus near the frame's lower right corner. Lacus Perseverantiae at centre.
LPOD Photo Gallery Lunar Orbiter Images Apollo Images
Although there's nothing in the LPI's lists for Lacus Perseverantiae, this dark region was frequently photographed during several missions of the Apollo program.
Because of its proximity to crater Firmicus, it is wise to search in the list of all orbital Apollo photographs of Firmicus.
Apollo 17's oblique south-looking Fairchild camera frame AS17-M-1631 shows Lacus Perseverantiae near low-albedo crater Firmicus (near centre of frame).
Research Danny Caes
Small mare like region west-northwest of low-albedo crater Firmicus.
Lacus Perseverantiae is part of a much larger feature which is unofficially known as the "North Valley"/ "Vallis North", or the "Vermiform Valley". These unofficial names (and descriptions of the feature itself) are mentioned in the Hitchhiker's Guide to Rukl's Chart 38.
"Lake of Perseverance".