As best as I can see in the pictures I do not see any indication of a cross bolt.
From an 1895/96 Clabrough, Golcher & Co catalog from San Francisco Cal they show three type of bolting on Hammer guns & two types on Hammerless.
On the hammer guns they show a plain unbolted Doll's Head, a Bolted doll's Head & a bolted "Cloverleaf" extension. None of these at this point utilized a cross bolt.
On the hammerless guns they show a plain unbolted Doll's Head or a straight extension rib with Cross Bolt.
All had double underbolts in addition to the Doll's Head with or without the top bolt.
