Many are solid brass with eccentric collimatable cells. Glass is Very good to excellent. Some are circa 1910-30 military. Some need a little cleaning.
Make a nice brass finder! I want to clear these out. Some nice glass here from Europe. One pair is Hensoldt 30mm, very sharp Zeiss post WWII coated optic.
Take all 12 (sorry two are not in the picture but they are brass) for $45. shipped. Paypal 2%