- Having seen the bases of the two suspected reproduction flasks I would now agree, reproductions.
On flasks of this type you would be looking for pontils something similar to those shown in the
photograph below which are a couple of examples from my own collection.
In respect of the flask you have annotated as 'Bottle 14' it has all the appearances of a late bottle.
I'm not sure you could describe it as a reproduction as I don't think it is actually reproducing any known examples?
Possibly best described as a 'Vintage Style Reproduction'!!
Yeah it's an odd collection, a mix of some beautiful specimins of early American glass, some modern Pier One Imports decorative type stuff, and a couple of near-worthless common liquor bottles. Still, there is a good number of genuine ones there, so assuming you didn't pay a massive amount you likely got your money's worth.
Going through the pictures you've posted so far I'd say: Picture 1 - the little blue one is modern and I think the other two are antiques but not sure what they actually are. Picture 2 - middle flask is likely genuine but not certain, round green one is probably modern, case gin is antique but pretty common. Picture 3 - Too far outside my area of knowledge to say for sure but I'd guess antique. Picture 4 - two on the left are modern, second from right looks interesting but I really don't know what it is, far right is a common UK gin ca. 1910. Picture 5 - Two on the left are very good flasks, second from right is a common post-prohibition bottle, far right I can't see what it is but doesn't look too old. Picture 6 - all but the far right look very good.
The 2 Green flask looked like reproductions to me. SO, I'd have a professional appraiser/Bottle Expert analyze the rest to verify Authentic & not reproductions. Just my ameture opinion, I'm no bottle expert. LEON.
The Metropolitan Museum of Art also commissioned reproduction 3 piece mold items
in the 1970's such as the one shown below from my own collection.
These, however, are easily identified with the embossed MMA mark incorporated into the design.