Jim,
The Type IV (4) tender had a curly-q (sheet metal knuckle) Type X coupler in 1939 when it was used in the double header set. It was the tender behind the powered locomotive. The dummy locomotive had a curly-q on the front.
Sorry for the fuzzy shot on this one.
Are you sure about the other tender being a type 9? That is a sheet metal semi Vanderbilt only made in 1934 and I don't remember it coming with a torpedo engine.
Are you thinking of a type XII? It was available from 1936 to 1939. The 1939 version was grey and had the curly-q coupler.
Northwoods Flyer
Greg