I do believe the Singer 27s take the regular 15x1 (Singer 20-20) needles. Yes I treadle on carpet. Yes the carpet hinders the treadle foot plates motion, so I use the rubber furniture pads under the treadle rollers. That lifts it up almost a half inch give or take a bit. Enough to treadle it anyway.
WOW! That machine is PURTY! Looks almost brand new. Some oil and a bit of cleaning should get it sewing
lickity split < my mom used to say that
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That cabinet is yummy
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I "think" that bungy looking thing with the slotted leather tabs is to put on your reading / sewing glasses so you can hang them around your neck when your not using them.
Joe