The Geloso M1100 Vintage Piezoelectric Microphone was produced between 1952 and 1956 in Milan, Italy. This design is quintessential Machine Age, reminiscient of a space age robotic creature like R2D2. Geloso produced a few microfonos with a potentiometer in place of an on/off switch. This crystal mic was reputed to have a linear frequency curve response between 40 and 7000 cps.

Cosmetically, the condition is good despite signs of age, mild denuded paint and scratches. The cable has been cut and there is no connector. The function cannot be assessed. There is no stand included.



    Postal Policy:

      The only postal option offered is the United States Postal Service, Priority or Express mail.   

      International postage will likewise be provided solely by the USPS but surface mail options are not provided as the delay in delivery often results in disputes and anxiety on both ends. For all international orders using Express Mail, the buyer must supply a phone number.


    eBay Policies:

      No Excessive Negative Feedback.  Please note my feedback. All of my negatives have been retaliatory as I participate in the eBay community by honestly giving feedback.

      I reserve the right to cancel any bids for any reason.

      Email for questions and/or customized transactions.  

      Payment options include PayPal  from verified accounts only, otherwise a Postal Money Order may be requested.

      I do not accept personal checks.

      International bidders may pay using PayPal only.

      Payment is expected within 5 days of sale.

      After 7 days of non-payment, the transaction is voided and a non-payment is registered with eBay.

      Returns are honored within 5 days of receipt if the item has been misrepresented. Insurance may be required on returned items.


The buyer is permitted to use any of my photographs for any commercial or noncommercial application