10 Dec 2009, 06:27
this is the module between the mkI/II and mkIII. it is called the 2100. the difference is the leap year cycle is shown with the running seconds. the mkIII/IV shows the weekday with the running seconds. they are both 4 reed. the 2100 has 3 on top and 1 rear on the right. the mkIII/IV has 4 reeds on the top. they are set differently. there is a photo of the 2100 instruction booklet in the photo gallery under synchronar-ragen-riehl. it is the zip file not the pdf file. the particular page with the setting instructions is labeled synch21004.jpg when you open the file. jeff, i know this will help you on the ones you have running. the dot matrix is really cool. i just knew i saw these instructions here on the forum. i have spent a little time searching all the posts and then one of ed's posts gave instructions thru the gallery on the mkIII/IV and a light went on in my head. i am a little slow sometimes. 
peter
peter