Up for sale is a Montblanc Model 17.5 Octagonal eyedropper-fill Safety in Black Hard Rubber. Quite rare since these pens were produced from only 1930 – 1934. Is has the correct Montblanc “4″ nib. The nib is a Fine nib and has nice flex. The cap signed both “MontBlanc” and with owner’s name, “Albert Ludders.”