Vase ID - Murano

Hi could anyone tell me about these silver overlay vases are they possibly Murano ? The green one looks to have  something like Murano written on it and remains of a sticker. How do I go about cleaning them ? Thanks.

There is a German glassmaker, Mosel, which fits with the name on the label.
Cleaning should be ok with just warm water and soap liquid and a soft cloth.

These are Murano, silver overlay glass. Tourist ware from 30s to 70s mainly, and not particularly desired today. It is real silver used for the overlay be and soapy water will do nothing to polish it up. You can polish using silver polishing cream like Silvo but be aware, the be silver layer is so thin it will most likely polish right off. Probably better to leave it tarnished