Rollei Rolleiflex Hellblau Light Blue Filter Bay I 28.5mm -BGN, Coating Wear-
This is a light blue filter for color correction or lightening the sky in your black and white photography. It is Rollei Bay I (28.5mm) and fits all of the Tessars and Xenars with bayonets.
It is in good condition with moderate wear. There are a few spots of coating wear and a few fine marks on both sides of the glass that may soften your images very slightly when shooting in harsh conditions. Otherwise the glass looks good with no haze or fungus. The body shows moderate wear but the filter has plenty of life left.