I recently pick up this M40 Panzer Grenadier tunic. I wanted to share this with you, but I had a question about the faded size stamp. The previous owner believed that there was possibly a "Unit Stamp" below the faded sizing stamp. In certain light, there appears to be "something (letters / numbers)" present. From your experience, is there anyway that these faded numbers can be brought out, to further identify the unit?

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