Maxentius. 306-312 AD. AE Quarter Follis (16mm, 1.58 gm) Rome mint. Struck circa 310 AD. 

Laureate bust right, seen from behind
VOT / Q Q / MVL / X X in four lines across field; all within wreath; 
Mintmark RT. 

Cf. RIC VI 238 (Half Follis). VF, olive patina. From CNG Electronic Auction 80, lot 207. 
Sold for $90.

Used with permission of CNG coins, www.cngcoins.com, Jan. 2011