I entered this in the registry before I posted, I believed it fell in the carbine range. I put a magnifying glass on the model#, it's struck clean and I can see the bottom tail of the nine. I'm not interested in establishing value as much as determining how it was born.

I'm attaching a screen shot from the registry, what does "third block" mean?

Based on production numbers from gun-data.com, there were no M1899 rifles. Is this incorrect? Would they have used left over rifle stock to build the late 1901 production year carbines?

---