Thanks for the reply 8borerifle,

There seems to be two separate issues (I try to explain them without confusing any of you readers more than I have done so far):

1) According to my phonecall to Dickson&McNaughton this 16-bore #1093 Rodda was not made by A. Henry, since the #1093 entry in Henry records lists a .451 rifle. But let's leave this thing aside for a while.

2) Regarding what you mentioned, a more interesting issue is that the person at Dickson&McNaughton said that according to Henry records the serial number #1093 was used on a rifle that was made in 1875. This piece of information does not fit into your findings at all.

I don't know the explanation, but I guess I'd rather believe your combinations of serial# and year, than this #1093 & 1875.

I guess I'll have to call them again, and I hope it will be less difficult this time...

(BTW, the #1093 on this rifle cannot be the use number, since it is engraved/stamped on the trigger guard, buttplate, watertable, barrels, forearm... And furthermore, there actually is a separate use number "933" of Purdey 2nd patent thumbhole lever on the watertable - see here.)

Regards,
Saku