Tick marks on scale bar are millimetres (mm).
Photo is available for non-commercial use. I do however request that if you would like to use any of my images that you contact me (see www.microphoto.co.uk for contact details) as I like to know how and when they are used.
When using this image I also request you cite the source as 'microphoto.co.uk'.
If you think this observation is inaccurate, please add an ID, participate in the quality assessment above, or describe the inaccuracy in a comment.