From Jeff Hittman, here are the old (pre-1969) English units of money.          
                                                                                
                                        | Rough American Equivalents            
----------------------------------------+-------------------------------        
 quarter pence                   = 1/4d |                                       
    half pence                   = 1/2d |                                       
         pence = 1/240L          =   1d | penny  = 1/100$ =  1›                 
      tuppence                   =   2d |                                       
     thrupence                   =   3d |                                       
shilling (bob) = 1/20L   =  1s   =  12d | nickel = 1/20 $ =  5› (not 12)        
        florin = 1/10L   =  2s   =  24d | dime   = 1/10 $ =  2 nickels          
    half crown           =  2s6d =  30d |                                       
         crown = 1/ 4L   =  5s   =  60d | quarter= 1/ 4 $ =  5 nickels          
  pound (quid) =    1L   = 20s   = 240d | dollar =    1 $ = 20 nickels          
        guinea =    1L1s = 21s   = 252d |                                       
     sovereign = supposedly 1L, but     |                                       
                 actually worth about 50|