Esemplari della tipologia
Collezione privata
ND (1887-1898) – (en) Hartill#22.1276: Large type; Tong with open head (South branch)
ND (1887-1898) – (en) Hartill#22.1276: Large type; Tong with open head (South branch)
Collezione privata
ND (1900-1908) – (en) Hartill#22.1279: Small type; round top Boo (West branch)
ND (1900-1908) – (en) Hartill#22.1279: Small type; round top Boo (West branch)