Monica,
It was very interesting to see the different machines that can convert from lock stitch to chain stitch. Every one was different. My White Rotary used a special stitch plate and what looked very similar to it's regular hook and race. Your Standard used a cute looking "spider" and I think a special stitch plate. My Domestic VS used a spider and special stitch plate. Bernie's Singer 412 used a special threading pattern, a special thread guide and a special throat plate.
I wonder how many other machines can convert between lock stitch and chain stitch? i know that the Singer Touch and sews can also convert.
I'm glad that you have a good time at the TOGA.