This is a bonus cache for the adventure lab caches - Secret Agent.
Play the Adventure Lab here: https://adventurelab.page.link/jjcy
Or scan this QR code:
Read the Adventure Labs FAQ for more info on how to play them.
The coordinates for the bonus cache are
N52 57.ABC W001 08.DEF
Compelete the adventure lab caches in order to get the required numbers.
Logging Etiquette: Geocache hiders sometimes go through a great deal of planning to place their caches. As a result, they'd like to hear your feedback on whether you liked or disliked any aspect of the hide, or if you feel that some cache maintenance is required. Single word, acronym, or emoticon logs may be easier when you have a lot of caches to log, but it doesn't tell the hider or other finders anything about your adventure (or lack thereof) in finding the cache. Please keep this in mind when entering your log.