Topic: Early Riedel vase markings

[zweibelkuchen]

Hi! New to this board.  After a hiatus of sorts from collecting, I bought a new piece that caught my eye that I knew little about (I love the mystery in searching provenance).

I've identified this vase (hopefully correctly) as being of Josef Riedel (the father OR the son, maybe mark ID will help), late 1800s.

The mark on bottom "A/127" matches a very scant few other works i've searched that have been attributed to Riedel, with markings (as examples): "D/526", "C/398" etc.    I've no idea of the significance of the letter or the numbers, and was hoping someone here may be able to point me in the correct direction! 

Picture links below for reference, and I appreciate the knowledge all of you have compiled here!

Marking https://flic.kr/p/2pq54gx
Vase https://flic.kr/p/2pq54gC
bird detail https://flic.kr/p/2pq5Z8M

[zweibelkuchen]

Posted for future reference:

https://mmu.on.worldcat.org/oclc/1159749162(a book in manchester UK on loan from Czech glass museum, not digitized. Czech language)

https://www.etsy.com/listing/784562940/josef-riedel-uranium-satin-art-glass Similar marking

https://www.collectorsweekly.com/stories/105667-josef-riedel-polaun--basaltglas-vase Basaltglas, Riedel --Similar marking


https://www.collectorsweekly.com/stories/228529-josef-riedel-light-green-satin-enameled Green Satin, Riedel -- Similar marking

https://www.theoldcinema.co.uk/austrian-josef-riedel-basaltglas-vase-c-1890.html#item-6 another Basaltglas, Riedel -- Similar  marking

https://www.collectorsweekly.com/stories/273152-uranium-glass-vaseBluish satin Riedel  -- similar marking

https://www.collectorsweekly.com/stories/258460-tiny-riedel-glass-perfume-c-1890?in=user]https://www.collectorsweekly.com/stories/258460-tiny-riedel-glass-perfume-c-1890?in=user]https://www.collectorsweekly.com/stories/258460-tiny-riedel-glass-perfume-c-1890?in=userTiny Riedel --Notable difference in signature, maybe because smaller piece?  Comments section is nice here