I went to a local industrial sewing machine parts place today and got some needles for my Junker. Fortunately, it had a complete rusty needle. I had cleaned it up and was able to make some stitches. I had taken it with me and said I want some needles like this one. I will probably go back and get some more in different sizes, now that I know they will work with the Junker. On the package of ten, it has DBx1, 1738 and 12/80 (this last is the size of needle). On the receipt that they printed out for me it says 16x257.
Also, I forgot to mention (maybe because I forgot it in the first place), that the hand wheel turns toward the back (clockwise) - otherwise it won't pick up the bobbin thread LOL. On the Junker, when the stitch length lever is down, it is forward and further down is longer stitch. To reverse the stitch, the lever goes up.
Oh, while I was at the industrial place I was just looking and saw some check springs that had the U-type bend but I don't know if they would work with either the Adler 87 or the Junker, but the sure looked to be the same shape.
Janey - Neat people never make the exciting discoveries I do.