Loetz II-180 in Norma; II-181 in Gold Papillon[1900]

These PNs are of particular interest. In Cantz p.60 they appear separately but next to each other as I-8058 and I-8059 [1899] and once more on p.73 as II-180, II-181 [1900].
[1] I-8058 in Norma
[2] Consecutive PNs for 1899.
[3]II-181 in Candia Papillon, which I just acquired
[4] PN for II-181.
I call this shape "jigger -inspired". In its Loetz version, it is 12o years old!