Bronze AE3, 19mm, 3.29gm, issued AD 321/322 Londinium mint.
Obv: CONSTANTINVS IVN NC, Helmeted, cuirassed bust left.
Rev: BEATA TRANQVILLITAS (PLON in ex.), Globe on altar inscribed VOTIS XX; above, three stars.
References: see Sear 17151, RIC 237.
Rare.
This coin fits the following collection focus(es): Ancient British.