Similar question , flying new service SFO to AMS on UAL, which lands at 1020,

The only good connection is 12pm, or 100 minutes later, on AEGEAN, to MYKONOS through Athens

1. Can we check a bag all the way through, do we pick up and recheck in AMS or ATH or JMK
2, is that enough time to transfer on two different PNR at AMS, an airport i haven't been to in years