Last week I watched this auction
end for Regd No 60785 Czecho Slovokia (On metal hinged collar)
Tonight I saw another auction and hunted out the old auction
they were different! RN 719074 (On glass)
So I did a search and found this auction and yet another number
REGD. NO. 69109 / CZECHOSLOVAKIA (On metal hinged collar)
I expect two of the designs refer to the hinged metal but one at least for the glass! Just struck me as a strange coincidence.