For anyone wondering about the marked key, it's 25 uses : r/EscapefromTarkov
Official Trading Thread - Page 264 - Off-topic - Escape from Tarkov Forum
RB-PKPM marked key - Tarkov Database
Buy Rusted bloody key open for quest, Escape from Tarkov
Rengawr on X: "What are you talking about Marked Key doesn't have charges?? Let's go reserve I just got 2 Weapon's Cases last raid https://t.co/cce3vmAGAb" / X
RB-VO marked key - The Official Escape from Tarkov Wiki
Marked Room Key - General game forum - Escape from Tarkov Forum
Remember to check jackets. Found 2x Marked key in Woods in one Scav run. : r/EscapefromTarkov