Identification 3a

Yes - Then it could be one of the following...

 * Lemair Helvetia 80 Surrey
 * Lemair Helvetia 160 Cambridge
 * Lemair Helvetia 370
 * Lemair Helvetia 903 Sapphire
 * Lemair Helvetia New Custom Straight Stitch
 * Lemair Helvetia Special
 * Helvetia Free Arm A