I've just got one vintage eyepiece of this type/size as follows:
- Magnification = approx 6x
- Diameter = 22.93mm
- Depth of fit = 27.75mm
- with brass sleeve that adjusts the fit diameter to 26.34mm
No maker's name that I can see, but a quality vintage piece. Needs a light internal clean.
The eyepiece will be well wrapped and shipped by Royal Mail.
Thanks for looking.