The closest Singer gets to my BD is a 66 authorized April 2 but there's a 221 on April 22 which is my niece's BD (not year!!) AL prefix starting in Feb with a 16 with 665741 only 500 made and ending in Nov. with an 18 model, 8996890 only 500 of those, too. 230,700 machines authorized in 1954 so I think I can find one sometime.