Another War merit cross from Pforzheim, this time with number 18. Could the number be a Die number at a manufacturer? Also any explanation of the markings on the Spange very welcome to recieve in comments.

Germany 1914 1918 War service cross with swords R.V. PFORZHEIM 18 reverse

Close up of the markings on the Spange (ribbon bar) no idea as to the meaning?
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War service cross (Frontfighter Cross - Frontkampfer Kreuz)