Purchased these in Murano, Italy in the 1990s

They have either been in storage or on display, never used

One is a fountain pen with a metal nib (green and yellow base)

the red/ multi colored one comes with a pen rest and has a glass nib

The third one is a translucent lavender with red accent and clear glass nib

The other is green swirl and has a standard pen inside (I'm not sure how to replace the insert).

Set of (4) one with rest

For your glass collection, or for the writer in your life to use!