That is easy: Two Days. If it takes several sessions to get it open, I am gonna keep it. At least until I have learned all its secrets. I have about six such i

That is easy: Two Days. If it takes several sessions to get it open, I am gonna keep it. At least until I have learned all its secrets. I have about six such in the training box right now. And one which I have opened only once ever. Inscription: "Lois & Edwin, March 2018". Yes some English people of Helsinki. Sorry Lois and Edwin, you should have choosed the cheapie version with 3 straight pins. BTW. The lock is ABUS 72/40. Some springs are very weak, so it may be that some pins are stuck.