Hi Joe,
It's most likely a 27 or 127 vibrating shuttle machine, but when you post the photo we'll be able to tell. The vibrating shuttle machines have two long, rectangular slide plates running front-to-back the depth of the bed, positioned just to the right of the foot. (Often the back plate is frozen in position and the front plate - the only one you need to move for access to the shuttle - is missing.) Looking forward to seeing photos!
James
Last edited by Manalto; 11-29-2015 at 11:11 AM.