WW1 Era German Coin Trench Art Brooch

Here is a brooch made from three German coins, I think they are 5 Pfennig and 10 Pfennig coins, one has a visible date on the back for 1913 but it would have been made after this date, the centre coin has been cut to let the two smaller ones in and all three are fixed together by a back plate with heavy solder, this has been done in a messy way and some of the solder has bled through to the front, other than that it is in good condition and measures 1.75 inches long.