2 years ago I had made a replica of the BSA folding bike :

http://tdvma.blogspot.nl/2014/12/back-to-bicyles.html
http://tdvma.blogspot.nl/2015/02/bsa-parabike-deel-2.html

today I learned that a folding bike is still used in the military and is offered as such:

https://www.montaguebikes.com/product/paratrooper/

email (option): ruud.klaui@gmail.com

Great job Ruud...I admire your determination and the results of your work...Ian:relaxed:

email (option): ian@wright52.plus.com