I don't know if this is similar to yours, but this one is up for bids on ebay
http://search.ebay.com/antique-White-Rotary-sewing-machine_W0QQcatrefZC6QQdfspZ32QQfromZR40QQftrtZ1QQ ftrvZ1QQsabfmtsZ1QQsacatZQ2d1QQsaobfmtsZinsifQQssP ageNameZRC0021QQ_trksidZp1638Q2em120