Description : • x 5 Huyghenian without pointer.
• x 5 Huyghenian with pointer.
• x 10 Huyghenian without pointer.
• x 10 Huyghenian with movable pointer.
• x 10 WF without pointer.
• x 10 WF with movable pointer.
• x 15 Huyghenian without pointer.
• x 15 Huyghenian with movable pointer.
