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5778c&o Scratchbuilt C&O 18742 "Dinkies" ...

This locomotive is unique on the Chessie roster.  It is the oldest, the only battery powered and the only locomotive with a five digit number.  It is also the only C&O paint scheme with a safety slogan.  Finally, it is the only Chessie locomotive with the Ches-C on both ends.  It is also the only locomotive to not have the owning road's letters near the road number.  Typically, "C&O" would be on the side on the C&O blue scheme, and it wasn't on this locomotive.  Curiously, "C&O" wasn't on top of the road number in the Chessie scheme either.  Finally, keeping the streak up, "CSXT" was not under the road number in that scheme. 

Built by General Electric in October 1917, it is a 15 ton Type LSB-2E12 Storage Battery Locomotive.  It was briefly used by GE at the shops in Erie, before being sold to Newport News Shipbuilding & Dry Dock Company in 1918.  It served them as their E-6.  The locomotive was in service with them through the end of World War II.  Sometime in the 1950's it was acquired by the C&O and numbered X-5000.  It was renumbered 18742 in the 1950's or 60's.  It is unknown why this number was chosen, as it is not the serial number of the unit.  This locomotive served primarily in the Huntington, WV shop complex for the remainder of the C&O era.  It wore standard C&O Enchantment Blue paint, but had a safety slogan on the nose, "BE CAREFUL".  It was painted into Chessie paint rather early in the Chessie era.  I have 1977 photos of it showing worn paint.  It got CSXs colors, in their Stealth scheme, shortly after the CSX era began.  I did a CSX version, to satisfy the NMRA Master Model Railroader Motive Power Certificate requirement to build three locomotives.  I was already doing C&O and Chessie, so doing one more wasn't that much more work.

18742 still exists today.   CSX donated it to the B&O Railroad Museum in Baltimore after it was retired.  It is not operable and not on display, but at least it is preserved. 

Below is the prototype photo of #18742.

Below are shots of the finished models.
Family shot:

C&O paint scheme:

Chessie paint scheme:

CSX paint scheme: