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The GP30's are unique amongst General Motors designed locomotives in that they have a noticeable buldge above the numberboards.  This hump gives the GP30 a very stocky appearance.  They are a favorite amongst railroad modelers.  My #6930 is a Life-Like Proto 2000 model that came decorated as B&O #6921.  See my Life-Like Proto 2000 GP30 page for information on how to build this unit.  I built this unit at the same time as the nearly identical GP30 #6974.

This order of GP30's had some hard luck.  #6912, 6920, 6940, 6946, and 6962 were all wrecked prior to the Chessie Era (1972-1986) and scrapped or sold back to General Motors.  #6942 was wrecked and scrapped in 1972, but I am uncertain of exactly when in '72 this happened.  #6965 was retired in 1981, so it too didn't make it to the end of the Chessie Era.  Some of these GP30's were converted by Chessie to GP30M's.  These are noticeable by their slotted battery box additions amongst other things.

After the Chessie Era some of the remaining GP30's were converted to road slugs.  They are now basically shells of GP30's.  There is no engine in them, and they are used to provide extra traction to the mother unit like Chessie's B&O 138T, 139T, and C&O's 140T-150T slugs.

#6930 became CSX #XXXX in the CSX renumbering in 1987 and  1988.  In 1989 it got converted to road slug #XXXX.

Below is a pic of the real #6930.  It lasted in this paint scheme until the CSX era and was never converted into a GP30M.  It is therefore perfect for any part of the Chessie era as painted here.

Below are pics of my finished model.