These fittings came with my W32, stuffed into one of the drawers, and are probably a nautical flea market find of the previous owner.   They are made up from stamped stainless steel, and look odd to me.  Two of the fittings are virtually identical except that one has the pintle pin and the other has the gudgeon hole.  They are for a 1-1/2 inch thick rudder, with 3/4" x 3" side straps.  The pintle pin is about 5/16" or about 7 mm in diameter.  The corresponding hole on the other fitting is the same size.   The fitting with the pin is marked "R/70C" and the one with the hole is marked "R/75C".  The third fitting is a pin fitting on a trapezoidal base (for transom mounting, I assume) and is marked "R/74A".   A fourth gudgeon fitting is missing.  I would guess that it should be a similar trapezoidal piece to correspond to the strap style pintle fitting.   The new RWO fittings are pretty pricey but I'd let them all go for $40 plus shipping.   Anyone interested in them can email me at tkoehl2769@comcast.net or call 321-305-4739.  -Tom Koehl (Melbourne FL)