The hand wheel on the top right,just below the head moves the head back and forward.
Im doing an Alexander up at the moment and have it in dozens of piece , very nice mills (exquisitally made) as are anything in the Deckel mould.
The only gripe people seem to have is the small quill movement (though dont know how the Stanko quill movement compares to Deckel/Alexanders) and price of accessories (used) but they often come used with alot of accessories.
Ive also heard the Stanko parts are almost impossible to find.
Theres a Deckel FP1 on ebay at £100 last time i looked.