A couple more from my collection, this time with screwpost and disc fastening devices for assessment and comments, please. I am working from the assumption that these are period originals, but would appreciate receiving opinions on this matter. As well, given that no maker marks are present, it would be nice to know if the makers can be identified from the high-resolution pictures. Both have magnetic cores.
Thank you,
John
First-up is one with a double screwpost and hex nut fastening device:
Thank you,
John
First-up is one with a double screwpost and hex nut fastening device:
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