No bubbles and all seems to work ok as shown in the video clip / photos.

I bought this from another site as is. I don't know much about these. It all seems to work as shown in the video but please check its calibrated/ suitable for use before trekking off and relying on it in the middle of nowhere!!   I am sure its fine but rather be honest about it. There are companies out there that do that sort of thing.    

compass reads in mills 

any questions just ask 

any more photos etc just message