PARKER 21 - TROUGH CLIPS - GREEN and BLACK - AEROMETRIC FILLERS - NICE  -  Here is a pair of very nice Aerometric Filling PARKER 21 pens with trough clips  -  Forest Green and Jet Black -  chips or cracks, no personalizations and the black pen has 2 original stickers. The green pen cap turns freely when closed - the cap remains fixed and secure but it turns easily - I dont think this is anything but I want to mention it  -  all our pens are sold as acquired from local estates, Untested  -  buyer pays 6.95 safe bubble shipping and tracking in USA