The oil looks to yellow compared to the real amps I've had in the past. It is also fairly thin and flows from tip to base easily. The amps are different sizes and I don't recall if the previous amps i've had were the same or not. Also, the bottom has an indent in it, the labels have rounded corners and are not sharp edges. It's been a couple years since i've had Bayer Primo amps so any help with these is much appreciated.
Thanks for commenting!