Charles I AR Penny Tower mint under Parliament, 1542-1548 (reigned 1625-1649), 12 mm, 0.38 g. mintmark dots. 

CAROLVS.D:G:M:R:F:ET:H:REX., crowned bust left, I behind head.
IVSTITIA THRONVM FIRMAT, Oval shield. 

Seaby 2851.

With permission of cngcoins.com, auction 435, Lot 605. Jan 2019