August Müller visor question ?

[KJV]

Hi Guys,

Did August Müller ever use the Stirndruckfrei system on their visors, I found one post on a SS cap on the site that they thought was a August Müller with Stirndruckfrei,but people said that it was not a sweatband August Müller used and was most likely replaced, any help?

Thanks,
Kevin

[SgtB]

Going strictly on memory, I cannot recall seeing one. But it is not beyond the realm of possibility. Any Pictures?