Scutum designs for Secutor and Mermillo

[Amalric]

I recently purchased a scutum blank to use as a part of my gladiator kit. However, I don't know what design I should paint it. I was wondering if anyone had any pictures of Secutor or Mermillo shields. Historical examples (actual finds and mosaic depictions) are prefered, though pictures of reconstructions will be appreciated as well. My hope is to use this shield as both a Secutor shield and a Mermillo shield. Thanks in advance!