I think so. I got some of the 10ml bottles from the same place that had these 50's a few years ago and they weren't marked. Look at the picture that gets shown when you select size. They're stock pix but these guys seem to be on the ball so I'd think they would have chosen correct pix for their supply.@Mowgli - Is it only the 50mL bottles that are marked though? It looks like it, but it's hard to tell from her pics.
These "50ml" actually hold 63ml BTW