I'm having a hard time recognizing which 2 1/4 x 3 1/4 Speed Graphics have Graflok backs. The 4x5 Graflok backs are recognizable due to the two visible metal rails, but none of the eBay samples of 2 1/4 x 3 1/4 Speed Graphics I've seen show the two rails clearly.
I've Googled the issue and searched the archives, but haven't found a clear picture of a Graflok back example in 2 1/4 x 3 1/4. The only examples I've found have shown the rollfilm backs attached, which obscures the rails.
Can anyone please post a picture of the Graflok back on a 2 1/4 x 3 1/4 Speed Graphic?