Yes it is a 1950s re-release. The original daybill is a different design printed by W.E. Smith and showing only the Rank logo without the BEF logo attached and the main image is of of the two leads about to embrace.
Yes the Spellbound ( 1945 ) daybill shown is an early re-release. The original release poster was distributed by United Artists in Australia. There is a similar designed Australian one sheet with United Artists printed on it that has been available for some time to view.
Comments
Re-release here as well:
http://movieposters.ha.com/itm/spellbound-united-artists-1945-australian-post-war-daybill-13-x-30-/p/7128-41015.s?ic4=ListView-ShortDescription-071515