Here is an incomplete catalog of Marx locomotives. Initially, this section will feature only
those locomotives that were un-numbered and are, thus, hard for the uninitiated to identify.
Photos not by William McFadden are used with permission.
 #635 MERCURY mechanical; non-reversing, with bell
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 mechanical non-reversing motor with bell
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 #635 MERCURY mechanical; non-reversing with air-whistle photo by Steve Eastman
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 mechanical non-reversing motor with air-whistle photo by Steve Eastman
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 mechanical non-reversing motor with air-whistle; notice straight lever photo by Steve Eastman
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 #635 MERCURY electric; photo by Steve Eastman
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 #635 MERCURY electric; notice the coupler for streamlined passenger train; photo by Steve Eastman
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 pre-war single-reduction motor with two-piece pickup; notice size of gears on drivers; photo by Steve Eastman
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 #635 MERCURY electric with spark mechanism photo by Steve Eastman
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 #635 MERCURY electric with spark mechanism photo by Steve Eastman
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 #635 MERCURY electric with spark mechanism photo by Steve Eastman
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 #635 MERCURY electric with spark mechanism photo by Steve Eastman
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 #597 COMMODORE VANDERBILT mechanical; non-reversing; photo by Steve Eastman
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 swinging-peg coupler; photo by Steve Eastman
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 mechanical non-reversing motor; notice straight lever; photo by Steve Eastman
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 #597 COMMODORE VANDERBILT mechanical; reversing; photo by Steve Eastman
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 mechanical reversing motor; photo by Steve Eastman
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 mechanical reversing motor; notice angled lever; photo by Steve Eastman
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 #597 COMMODORE VANDERBILT electric with manual reverse & swing-peg coupler; photo by Ken Stoller
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 #597 COMMODORE VANDERBILT electric with manual reverse & swing-peg coupler; photo by Ken Stoller
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 #597 COMMODORE VANDERBILT swing-peg coupler; photo by Ken Stoller
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 #597 COMMODORE VANDERBILT (re-painted)
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 notice the ten-spoke drivers
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 pre-war single-reduction motor with two-piece pickup; notice size of gears on back of drivers
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 #597 COMMODORE VANDERBILT with Baldwin drivers
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 post-war single-reduction motor with one-piece pickup
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 #994 notice length of locomotive and fake pilot and trailing trucks; photo by James McClenin
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 #494/#495/#593/#3000/CN Jubilee
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 #494/#495/#593/#3000/CN Jubilee with double-reduction motor and Baldwin drivers; notice gears behind drivers are smaller than the drivers (re-paint and non-original motor)
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 #897 mechanical, reversing notice angled lever; photo by Steve Eastman
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 notice angled lever; photo by Steve Eastman
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 mechanical reversing motor; photo by Steve Eastman
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 #897 electric; single-reduction motor; all 898s have hole for wind-up key; photo by Steve Eastman
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 single-reduction electric motor with one-piece pick-up; photo by Steve Eastman
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 #898 with mechanical motor replaced with double-reduction electric motor; notice slot for key; all 898s have key-hole on sideboards; some 898s have lighted number-board above headlight
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 #898 with with single-reduction electric motor, Baldwin drivers, and lighted number-board above headlight; notice key-hole on sideboards
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 #999 variations photo by Steve Eastman
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 #999 variations photo by Steve Eastman
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 #999 no logo photo by Steve Eastman
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 #999 logo on cab photo by Steve Eastman
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 #999 logo on boiler photo by Steve Eastman
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 #999 plain rivet pilot photo by Steve Eastman
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 #999 raised rivet pilot photo by Steve Eastman
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 #999 embossed pilot photo by Steve Eastman
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 #999 open-spoke pilot photo by Steve Eastman
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 Plastimarx #999 photo by Steve Eastman
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 Plastimarx #999 photo by Steve Eastman
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 #591 with single-reduction one-way electric motor and Baldwin drivers; note the embossed lead and trailing trucks; this particular example has cast-metal boiler front; photo by Steve Eastman
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 #591 with single-reduction one-way electric motor and Baldwin drivers; this example came without side-rods; photo by Steve Eastman
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 #401 battery-electric in less-common gray photo by Steve Eastman
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