Vintage Tiffany MFG. Co. Newark N.J.  - Used - Amp Meter reads 0 to 30 Discharge 0 to 30 Charge. Old Brass/Bronze trim facing with flat glass. The only stamping found is "PAT. Applied For" - Made in USA. Needle bounces (left or right a little each way) when meter is moved. Has no original box. Listed as used (couldn't say whether it works or not), this has been stored for many years, and was most likely used on an auto or possibly on a piece of equipment. No screws or other mounting hardware included. (Please see all pictures and use the zoom feature). Please compare this information provided with your information to determine if this will work for your application. Measures approximately 2 1/2 inches in diameter.