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manufacturer: Keystone Camera Co Inc, Boston, USA

founded in 1919 by Marks brothers, here

211-SL

812 TLX

814 TLX

K 609

K 610

K 612

K 614

K 615 - 1

K 615 - 2

K 616

K 620

K 622

K 623

K 625

K 710 H

K 714 H

K 715 P

K 716 P

XL 100

XL 200

XL 204

XL 300

XL 500

XL 727