Combined Gas/Electric Smart Meter

I am interested in swapping our smart meter for an analog.  The meter is located in the basement.  I am confused about what type of analog meter to buy.  This meter measures both gas and electricity usage (and we have a separate smart meter for water, which I would also like to replace.. and this communicates with the gas/electric smart meter).  Is that typical of a smart meter - to measure BOTH gas and electric, I mean?  I just need advice on what type of analog meter (or meters) I will need to replace the current smart meter.  The meter is not round, like the ones I typically see pictures of.  It is a rectangular box shape, and there are analog 'clock' dials on it, but I know it transmits wireless signals because I looked up the FCC id number.  

This is the meter:

CMM1401 Utility Transmitter Maximum ID Label/Location Info 95-1550-AB Model (1)

 Landis+Gyr Technology, Inc.

Thank you!