Celadon cup?

[massrog]

Hello, I'm new here and I hope you can help me to know what I got from my mother's estate. I believe it is a Celadon glazed cup. It's approximately 3.5" dia. x2.25"high. According to the limited research I was able to do it seems to have a Qianglong 4 character seal mark. Can anyone here shed any light on what I actually have here? Any assistance would be greatly appreciated.
Thanks,
Roger
postimg.org/gallery/24udl5abq/

[massrog]

  pic

[Stan]

The mark says " made during the Qianlong reign " but I think the mark is spurious, if it was from the period the mark would be centered but it looks like it is off centered, perhaps late Qing.