1: Hourglass 2: Hourglass 3: Hourglass 4: Hourglass from Basel 5: Hourglass 6: Four-glass pulpit hourglass from the church of St. Theodor in Basel 7: Four-glass hourglass, probably for a courtroom 8: Hourglass 9: Hourglass for doll house 10: Hourglass 11: Four-glass pulpit hourglass 12: Hourglass 13: Hourglass with one single and one double piston 14: Hourglass 15: Two-glass hourglass 16: Hourglass with a single and a four-part piston 17: Four-glass turret hourglass 18: Travel hourglass 19: Travel hourglass 20: Travel hourglass 21: Travel hourglass