Junghans Watch Form A Chronoscope 27/4371.01. The striking features of the FORM A Chronoscope include its distinct shapes and expressive colouring. The combination of deep black matt and polished surfaces creates a captivating dynamic. The highlights in yellow, grey or orange are inspired by a work of art by the British artist Richard Macneil and appears as a colour-adapted print on the glass of the case back. The mechanical chronograph is designed with a flat sapphire crystal and is water resistant up to 5 bar.