It's very uncommon to find a Twitchell without the characeristic hat top. This is a pony-sized blob top, which is of course hand applied. Circa 1875.
Embossed: TWITCHELL / T (large open block letter) / PHILADA // TWITCHELL / T (large open block letter) / PHILADA
Height: 7 1/2"
Condition: structurally perfect with no dings, chips, cracks. It's a dug, uncleaned bottle that has stain and some wear spots, but would tumble polish pretty well since nice strike.
Reference Number: GW101