Personally I prefer the Home and Away / Sophie Simpson era Rebekah but one has to be careful when posting any images.
Rebekah was born on Jan 23rd 1974 and was in Home and Away for 502 episodes (482 from #1,458 in 1990 to #11,158 in 1993 and then periodically for 20 episodes from #13,278 in 2002 to #14,000 in 2005.) so it is clear that many of her first 'stint' appearances would have been when she was under 18. For example, episode #1,950 first
aired on 28th Feb 1992.
Please refer to her page on IMDB for details of her appearances in Home and Away, Neighbours and in other projects; this can be found at:
http://www.imdb.com/name/nm0255365/
Cheers, rewbear.