Bob_M, personally I am not into the minute little differences concerning special classification. Naturally I do recognize them but for me the overall appearance of a dagger is in the first place.
This said, due to the quality, the kind of silvering, the crossguard eagle und the special scabbard treats I would think that the dagger shown here is an earlier one and the dagger in the other thread is a later one.
Both seem to be NOT nickle but a pot metal alloy. The photographs are not enough detailed for me in regard of certain regions, perhaps the crossguard of the one shown here might also be a brass alloy.
BTW both are very nice daggers, the simulated ivory grip is special!
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.