dsc96010.jpg

The identification plate for the engine. It reads

Part No.: 206600-71 Assy
Part Name: Body Thrust Chamber
Serial No.: 4088212
Stock No.: [blank]
Unit J-2113

Although the overall engine had a serial number of J-2111, the thrust chamber itself has a unit number of J-2113.

Apparently, it was not uncommon for Rocketdyne thrust chambers to have a different serial number than the completed engine; in this widely-used F-1 manufacturing photo, the thrust chamber on the right side of the photo has a serial number of "2010" while the nearly-completed engine on the left is engine F-2010.

This photo was taken in 2013. When I first saw this thrust chamber in 2009, the ID plate was in significantly better shape.