I have a very nice set of 3 pcs internal micrometers with 3-point head, good for bore diameter metering. All are graduated in 0.005mm, range is 11-14mm, 14-17mm, 17-20mm. Like a new in box. Made in Germany by Knuth.
Below is the Ebay link:
Knuth 11-20mm Internal 3-Point Bore Micrometer Set
Thanks for interest!