1688 / 1688E 2-4-2 Steam Locomotive
1688 / 1688E 2-4-2 Steam Locomotive, O27 gauge, Lionel Jr. in 1936
Same casting as 1588 and 1668.
Some versions have 1 number plate, some have 2.
Early versions have thin castings with pilot area thin and firebox not having doors.
Later versions have thick castings with thick pilot and firebox doors.
The very first issue 1688E in 1936, had open front windows in cab. This unit also had a raised roof hatch on top of cab. Another unique feature was a "winged keystone" cast above the headlight and just under the smoke hole. The cab also had an open back, where later issues had a closed cab wall "firebox". The "winged keystone" can also be found on the 1588 windup body.
Later 1937-1941 issues did not have these features. The 1668, which shares the same molding, was modified by Lionel, and different mountings were cast into the bodies, to facilitate the different motors used in these particular versions.
Points of Interest
The last two photos of the boiler front show 1936 castings with the "wings and keystone" just in front of the smokestack. The first is a 1688E and the second is a 1588 windup.
The last three photos show the first, second and third versions of the motors used in the 1688/1688E. The first version typically came with 8 spoked wheels, similar to the 1681/1681E motor. The second version typically came with 12 spoke wheels, and is the same motor used in the later version (Lionel) 258 locos. The linkage (side rods) were also the same. The third version looks similar to the Postwar 1654/1655 motors, and is mounted using screws through the body. The second version is mounted through the top of the body, and the front is inserted into tab openings in he front truck assembly.