601 (Nachet; Petit modèle; c. 1870)

602 (unassigned maker; late 19^th century to early 20^th century)

603 (Olympus; CK2 inverted microscope; 1980s)

604 (James Swift; Binocular microscope; 1870s)*

605 (unassigned maker; drum microscope; late 19^th - early 20^th century)

606 (Optico; toy microscope 408; 1960s)

607 (assigned to J. Parkes & Son; compound microscope; c. 1860)

608 (JH Steward; inclining microscope; late 19th century)

609 (unknown maker; simple compound microscope; late 19th century to early 20th century)

610 (unassigned maker; drum microscope; mid 19th century)

611 (Unknown maker; simple compound microscope; late 19^th century)

612 (unassigned maker; compound microscope; early 19^th century)

613 (unassigned maker; drum microscope; late 19^th - early 20^th century)

614 (Wood Brothers; inclinable microscope; c.1895)

615 (Unassigned maker; compound microscope; late-19th century)

616 (unassigned maker; simple compound microscope; late 19th - early 20th century)

617 (John Browning; pocket microscope; c. 1875)

618 (unassigned maker; achromatic microscope; late 19^th century)

619 (unassigned maker; pillar-type linen tester; 1850s)

620 (Wollensak Optical Company; 150 power microscope; 1930s)

621 (“Monkey” microscope reproduction)

622 (“Monkey” microscope reproduction)

623 (“Monkey” microscope reproduction)

624 (“Monkey” microscope reproduction)

625 (“Monkey” microscope reproduction)

626 (“Monkey” microscope reproduction)

627 (“Monkey” microscope reproduction)

628 (“Monkey” microscope reproduction)

629 (“Monkey” microscope reproduction)

630 (“Monkey” microscope reproduction)

631 (“Monkey” microscope reproduction)

632 (“Monkey” microscope reproduction)

633 (“Monkey” microscope reproduction)

634 (“Monkey” microscope reproduction)

635 (unassigned maker; educational microscope; late 19th century)

636 (R. Winkel; continental type microscope; c. 1915)**

637 (“Monkey” microscope reproduction)

638 (“Monkey” microscope reproduction)

639 (“Monkey” microscope reproduction)

640 (“Monkey” microscope reproduction)

641 (“Monkey” microscope reproduction)

642 (“Monkey” microscope reproduction)

643 (unassigned maker; botanical microscope; first half of the 19th century)