very nice looking pens. Just to add a little to the very informative notes from Greenie and Cob .............. if you go online - Mabie Todd Pen Listings - you can download John Bridle's pdf list of data for most of the Swan f.ps. - this gives details for the various pens ................ model Nos., cap bands, colour and filling mechanism etc.
Not sure how up-to-date the list is, but if you've not yet seen it am sure it will help. Most pre-owned pens benefit from some cleaning/polishing - if you rub a celluloid pen body with a suitable cleaner/cloth, you should get that 'table tennis ball' smell - it can be addictive. Of course if you don't get that smell from a pen then this might indicate BHR or Casein.
Your second pen shows some oxidation on the section - this part of the pen is almost always made from BHR/Vulcanite, and discolours if exposed to daylight - the olive/brown colour can be removed and returned to black.
Edited by PaulS, 06 November 2017 - 14:36.