3/4 plate lever movement with removable balance and winding wheel bridges
Inspite of the comparatively recent date since we commenced manufacturing high grade watches, Trademark "J" groups 100 - 108, these articles have already, owing to their high quality and reliability, gained a world-wide reputation. Our method is: Utmost precision in the production of all parts, ruthless removal and destruction of all parts which are found to be in the least faulty or inexact, assembling, examination and regulation by proved experts. This system ensures equal high quality of all our watches and absolute interchangeability of parts. The articles with the Butterfly brand are, on the other hand, of somewhat plainer execution but are nevertheless reliable timekeepers. They are especially suitable in all cases in which a tow price is decisive.
J53 Junghans catalog 1931 text:
Boys Own Watch, Pillar movement, 3 jewels, 3/4 plate, removable lever and balance bridges.
Pictures courtesy of Junghans-Vintage.de, Martin Fischer