Constantine's ADVENTVS into London

[Victor]

According to RIC VI, The ADVENTVS type from London "must refer to Constantine's threatened or actual presence at Rome to fight Maxentius." There has been some recent historical and numismatic revision on this type (much by Lee Toone), which suggest that the reverse might refer to an actual visit to London by Constantine in an effort to recruit troops prior to his battle with Maxentius. This could have happened in late A.D. 311- early 312.

Below are three examples, with the differences being the reverse legend of ADVENTVS AVG, ADVENTVS AVG N, and ADVENTVS AVGG NN

[Nikko]

I suppose that my COS II coin could confirm this theory.
Constantine celabrated his second consulate at Lodinium and in this occasion the local mint issued some consular coins.

[Victor]

I just got another example

Constantine I
Circa A.D. 311- 312
22x24mm    3.9gm
CONSTANTINVS P AV-G bust left, laureate helmet, cuirassed, spear over right shoulder, shield on left arm.
ADVENTVS AVG [The arrival of our Emperor] Prince riding left, r. raised, l. holding up spear, on horse pawing seated captive to l.
in ex PLN, Star in right field
RIC VI London 139