It's 40 years old, it is a moulded case tantalum, it is suspect anyway. Holes that are like that means it popped a bit from pressure to let out the magic smoke, and replacement is in order. Any more of ther same batch on the board replace as well, they will be close to going bang as well. Looks like it has a 10n ceramic chip capacitor in series, so easy to replace with a regular low ESR electrolytic, probably 22uF 25V, as that will be as low ESR as the 10/15 uF 16v capacitor, and will work well on that 5V rail.
Don't know how many i changed as they were EOL, though i was getting them in in packs of 100, and going through packs a week doing so. Must have thrown around 10kg of tantalum slug away at the end of it.