For the Minox IIIs, at what serial number were the sliding filters changed from green and orange to green and neutral density?

-- Karl Kleimenhagen (k_w_k@yahoo.com), April 15, 1999

Answers

The Minox A cameras with 10x ND filter replacing the orange filter were made in the period between 1962 to 1969, probably began with SN 142,000. Hard to find exact figure. It is a rare collector item

-- martin tai (martin.tai@capcanada.com), April 15, 1999.

Moses' book, Spycamera gives the change point at around No.143,000. This would mean just under 4,500 Minox IIIs were made with the ND filter.

-- Michael J. Vorrasi (MVorr99@aol.com), April 21, 1999.

On eBay, the seller of SN 142480 reported the camera had the ND filter, and the buyer of SN 141741 told me that one had the orange filter. The change probably occured between those two numbers.

-- Karl Kleimenhagen (k_w_k@yahoo.com), May 28, 1999.