19th C. stiletto?

[alex8765]

The pommel and the crossguard of your more recent example look casted, not chiseled. So, most likely it is mid-19th century dagger. I've never seen this maker's mark before, but blade's geometry look mid-19th as well. Just my opinion. Sometimes, this seller sells artificially aged modern replicas. This dagger well could be one of those. It's hard to tell without visual examination.