These photos are available thanks to Art Peterson. He is the curator of the Krambles-Peterson Archive which contains a wealth of historical photos from Chicago transit. Art has generously allowed us to share some of the photos from the archive. When available, he has also provided dates, locations, photographers, and background information on the photos. Thanks so much Art!!
KP0294-CTA #6133 Leading a Southbound train near Buena - 07/01/1961
KP0295-CTA #6135 Eastbound on the Ravenswood Line near Manor - 09/30/1951
KP0296-CTA #6142 In Evanston Express Service Southbound at Chicago Ave in Evanston - 07/16/1991
KP0297-CTA #6172 at the rear of a Northbound Ravenswood train at Diversey - 06/21/1954
KP0298-CTA #6180 Westbound on the Douglas Line pulling into Wood - 03/1954
KP0299-CTA #6180 at 63rd & Stony Island - 12/23/1976
KP0300-CTA #6184 Leading a Northbound train into Howard - c1960
KP0301-CTA #6195 at the rear of a Northbound N-S train leaving 35th - 10/03/1974
KP0302-CTA #6207 Northbound at 47th - 1954
KP0303-CTA #6217 on the back end of a Northbound Lake-Dan Ryan train at 83rd. The 6000s were in service to replace 2000s & 2200s that were down for repairs due to the blizzard. - 01/12/1977
KP0304-CTA #6222 Eastbound at Beloit Avenue - 04/11/1954
KP0305-CTA #6352 at Wentworth - 06/20/1958 (Thanks to Andre Kristopans for identifying this location)
KP0306-CTA #6496 Northbound at the Sheridan Curve - 04/08/1977
KP0307-CTA #6530 in Skokie Shops - 09/14/1969
KP0308-CTA #6579 sporting a sample paint scheme being considered for the 2600s. #52 and #2050 are along side at Skokie Shops for comparison. #6579 was repainted in regular 6000 colors after this. - 11/04/1980
KP0309-CTA #6584 & #6720 at Logan Square - 1964
KP0310-CTA #6644 on the back end of a Northbound Ravenswood train at Nelson Ave - 09/06/1991
KP0311-CTA #6677 trailing a Southbound train at Linden Place in Chicago. The vacant lot in front of the train is the site of the former Logan Yard - 08/10/1973
KP0312-CTA #6687 Westbound at the B&OCT crossing - 07/1960
KP0313-CTA #6702, one of two pairs of 6000s that received reflective safety tape, leading a Southbound train at Western & Milwaukee - 04/09/1976
KP0314-CTA #6703, the other pair of 6000s to receive safety reflective tape (in a slightly different position than 6701-02) at Des Plaines - 02/13/1976
KP0315-CTA #6709 on the Des Plaines loop, sporting a fresh coat of Bi-centennial paint - 02/09/1975
KP0316-CTA #6713 on the Des Plaines loop - c06/1961
KP0317-CTA #1 Northbound at Howard - 08/1960
KP0318-CTA #1 Leading a Northbound Ravenswood train at Chicago - 09/10/1962
KP0319-CTA #1 Inside Skokie Shop - 02/1964
KP0320-CTA #1 at East Prairie - c03/1964
KP0321-CTA #1 Northbound at Oakton - 03/11/1964
KP0322-CTA #1 Westbound at Kostner - 03/22/1964
KP0323-CTA #1 Westbound at LaSalle & Van Buren during clearance tests - 03/22/1964
KP0324-CTA #1 (leading #2, #3, and #4) Eastbound at Hamlin - 04/17/1964
KP0325-CTA #1 Northbound at Dempster on Inaguration Day - 04/18/1964
KP0326-CTA #1 Southbound at the Dempster Station - 02/28/1966
KP0327-CTA #1 Northbound at Main - 05/10/1965
KP0328-CTA #1 at Skokie Shop - 04/26/1974
KP0329-CTA #1 at the General Electric Plant in Erie, PA - 10/24/1974
KP0330-CTA #2 at Skokie - 04/1960
KP0331-CTA #2 interior - 04/1960
KP0332-CTA #2 Northbound at Niles Center - c04/18/1964
KP0333-CTA #2 at Skokie (sitting on a shop truck) - 09/15/1973
KP0334-CTA #3 Northbound at Fullerton - 05/31/1962
KP0335-CTA #3 at Skokie - c10/1963
KP0336-CTA #3 Northbound at Niles Center - c04/18/1964
KP0337-CTA #3 at Hamlin - 04/20/1969
KP0338-CTA #4 at Skokie - c10/1963
KP0339-CTA #4 & #2 Westbound at Kostner (Note the #4 has a pan while the #2 has a pole) - 02/11/1964
KP0340-CTA #4 Southbound at Dempster - 08/22/1964
KP0341-CTA #4 at Dempster testing the Stemmen pan installation - 01/1966
KP0342-CTA #4 Eastbound at Kostner - 03/15/1975