20774
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20775
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20776
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20777
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20778
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20779
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20780
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20781
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20782
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20783
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20784
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20785
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20786
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20787
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20788
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20789
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20790
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20791
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20792
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20793
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20794
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20795
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20796
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20797
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20798
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20799
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20800
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20801
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20802
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20803
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20804
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20805
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20806
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20807
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20808
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20809
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20810
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20811
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20812
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20813
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20814
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20815
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20816
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20817
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20818
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20819
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20820
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20821
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20822
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown
20823
Standard glass slide: 3¼ inches (83mm) square
Unknown
Photography
Unknown