Hello everybody, today i bought a pen from flea market which is old and dirty but working, i will clean it soon. I am a Pelikan guy and a total noob about Watermans but it writes Waterman's ideal 18k on the cap and 42 on the bottom and i think it's a safety pen. It would be perfect if you can confirm the model and give me some info about it's history, i don't know maybe the the dates of the production. And also can you give me an average value cause if my guess about the model is true i've seen it's price range between 250 dollars to 2500 dollars . Thanks for your help and an apology for the very low quality of the photos already.