Instrument #301, hand engraved aluminum and ink.
Instrument #302, hand engraved aluminum and ink.
Instrument #303, hand engraved aluminum and ink.
Instrument #304, hand engraved aluminum and ink.
Instrument #305, hand engraved aluminum and ink.
Instrument #306, hand engraved aluminum and ink.
Instrument #307, hand engraved aluminum and ink.
Instrument #308, hand engraved aluminum and ink.
Instrument #309, hand engraved aluminum and ink.
Instrument #310, hand engraved aluminum and ink.
Instrument #311, hand engraved aluminum and ink.
Instrument #312, hand engraved aluminum and ink.
Instrument #313, hand engraved aluminum and ink.
Instrument #314, hand engraved aluminum and ink.
Instrument #315, hand engraved aluminum and ink.
Instrument #316, hand engraved aluminum and ink.