I found a miniature Simplo fountain pen tucked in a bag with a tobacco pipe I bought. It looks art deco and only measures 2.5" long. The cap twists off and you turn the bottom of the pen to twist out the pen tip. The only markings are on the nib which says Simplo 14k. There is some ink stains in places where the finish wore off. Can anyone tell me more about the pen - model, time period, estimated value? I haven't been able to find another one like it searching online. Thanks for any info you can provide.