Interesting gun. That engraving pattern is similar to the pattern shown in later catalogs for their sidelocks. Curious to know what MI-bloc means - proto-Helicobloc maybe? I would love to be able to see the lock configurations as they appear to be different from the standard H&H. Pattern.

$16k? That is a bit ambitious even ignoring the apparent mechanical issues.

Such a long, long time to be gone, and a short time to be there.