Talk:Museum Levels and Rewards/@comment-86.158.14.245-20171206174603/@comment-41.60.173.250-20180120041615

It means that you have found one or more new locomotives for your museum collection at friends' stations. Same as actually physically visiting a friend's station and finding a museum loco you didn't have before, as you used to do before PF introduced the Friends link at the bottom right. Once you have collected materials and XP from friends, and you have also found new museum locos, your museum icon will show the number of new locos in your museum collection.