The 35mm camera used by Walter Zapp (allegedly), the ML sold less than 1/3rd the sales of GT ( 178,700 vs 653,343. It is telling that from 1996-2002, Minox went back to upgrading the GT to GT-E/GT-S/GT-X.
The shutter issues with the camera are solved with a £60-80 repair today (2006: £30-40). TThe Minox ML is a popular repair candidate with mostly shutter issues caused by decades of disuse. Prices are rising as older customers reediscover the camera and pass them down the generations. The Programmed mode, and the common PX28 6 volt battery remove some of the consistency issues with the G series of cameras.
Bigger than the GT series, with a re-designed elextronics, the ML was a success, even at a price of $199 in 1985 ($485 today).
Minox made two models of flash unit, for the ML/MB/MDC series. However, they do not fit the GT/E:L/PL series. The MT bounce and the ST straight.
The shutter used to be a problem. It was apparently re-engineered in the late 1980's but frankly, we see the same repair on all iterations of the camera. Customers who had invested a lot of money in their G series cameras were less than impressed to learn that none of the EL/GL accessirues and most of the GT accessories were compatible with the ML and its MB and MDC models. Only the ND and UV filter sets made for a 35 GT are compatible with the ML. Everything else (cases/flash) is not.
The 35MM and the 8x11mm EC and EC-X cameras are made from 'Matt black glass-fbre-reinforced Makrolon'. Makrolon® (formerly Hyzod®) is a trade name for Covestro (formerly Bayer MaterialSciences). These materials are all Polycarbonate which is a very tough, high impact plastic material. .