201 Worth
I purchased one like yours for $100 in a resale shop in Taylorville, Illinois. It was in the art deco, curved wood cabinet you describe. It has attachments. Rejoice, because the 201 is arguably the best machine Singer ever made. In fact it cost too much to produce and Singer went to a lesser machine right after the 201. A lot has been written about that machine. The tooling produced a very quiet machine you described. With a good cleaning, it should last a lifetime. Be sure to oil it per the manual. About every 8 hours of work should be fine. Someone once said of the 201, it could wear out 4 old ladies, at least. I resemble that remark. This machine will certainly outlast me.