Singer 127/128
Skaperverkstedets ABC
Manual (engelsk, pdf) til Singer 127/128 http://ismacs.net/singer_sewing_machine_company/manuals/127-128.pdf
https://en.wikipedia.org/wiki/Singer_Model_27_and_127#Production_records
https://www.fiddlebase.com/vibrating-shuttle-sewing-machines-history/
Tilbehørsboks til Singer 128/128
http://needlebar.org/main/puzzles/127128/index.html
Figur xx. Trade card med Singer modell nr. 127-3. Kilde: https://www.flickr.com/photos/boston_public_library/8902413201/in/album-72157633834851098/
Figur xx. Forside og bakside af et “Singer trade card” med en Singer-modell 128-3 fra en serie med sangfugler (nr. 16). Kilde: http://ismacs.net/singer_sewing_machine_company/the-american-singer-series/the-singer-portable-electric-number-128-13.html
Adjusters Manual 127/128 https://www.dropbox.com/s/ajm10e4v22etaax/127%20Adjusters%20Manual.pdf?dl=0