Southern Railway 4SUB(first batch) EMU
During 1940s the SR introduced a new welded steel 4-car suburban unit with curved sides, seating six passengers across rather than the normal five.
The later batches introduced at end of WW2 had slab fronts. They continued to be built into BR days, and survived up till 1980s. Designated class 405 under TOPS.
Used on the London suburban services of all three divisions of BR (S).
Unit number 4732, formed of DMBTO 12795, TT 10239, TTO 12354 and DMBTO 12796 is preserved
Driver motor brake 3rd
Requires chassis and finishing
Scale TT(1/100, 3mm/ft)
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more info about the 4SUB/class 405 here
https://en.wikipedia.org/wiki/SR_Class_4Sub
https://en.wikipedia.org/wiki/British_Rail_Class_405
more 3d printed models from Recreation21 here
http://www.rue-d-etropal.com/3D-printing/3d_printed_designs.htm