I saw this online recently, and thought it was pretty cool.
The way the barrel was done is clever. I guess it needs to be unscrewed for each shot to load with the short ramrod.
I wish there were more than 3 pictures though.
Here's the description from the site.
"16 bore, 36 1/4” part round part octagon barrel with nice reeded medial at the point of transition and a lightly oxidized bore. This interesting fowler was reconverted to flint some time ago and features a neat takedown system so that the arm can be taken asunder into buttstock, lock and forestock, and barrel. The barrel is an attractive mix of deep plum-brown and dark gray patina showing some light handling marks and a bit of old oxidation staining. The breech flats show nice little silver inlays that have taken on a fine tarnish consisting of light foliate motifs and standing figure of a hunter with horn. The lockplate is a more medium gunmetal patina, the cock somewhat loose with a bit more moderate old pitting and a few screws and the pan are replacements. The lockplate shows some light foliate embellishments and features beveled edges with slight step and teat at the rear, unbridled frizzen and frizzen spring with nicely chiseled extension and the trigger with a traditional curlicue. The remaining hardware is of brass with single faceted tailpipe and fancy foliate extension, triggerguard with elaborate foliate finial and scrollwork embellishments along the bow and a solid foliate embellished sideplate, all toning to a mild ocher patina showing some light handling marks and tarnishing. The walnut stock remains in very good condition showing a few scattered small repairs and minor drying cracks, a few old shallow chips around the lockplate and old handling marks. There is light foliate carving behind the breech tang, drop points and other light bordering that shows honest softening from the years. A 13 3/4” hickory ramrod with more modern brass tip is present and the mainspring is rather weak but the lock otherwise seems to function well mechanically. Likely German or French, examples similar to this were pictured and retailed in the Bannerman catalogs of old. A nice example of a peculiar “poacher’s” fowler for the antique arms collector."