There is Whitehill Silver Plate Co - an Australian company dealing in silver plate (kind of obvious I know). Good link to a previous Forum post on Whitehill - viewtopic.php?f=18&t=39168&p=107890&hilit=whitehill#p107890
. The "F" in your picture may be a date letter of some kind - hard to know with plate. They may still be in business (Google indicates they are) - a phone call may answer the date letter conundrum.
Also, I'd suggest silver plate not sterling silver - retailers and manufacturers go to great lengths to emphasise when an item is silver (e.g. "Sterling", Lion Passant, mandated hallmarks or similar) and, in the absence of such marks, I always assume plate.
Finally, in future please display the images in the post - not everyone likes to click on links to third party websites.
PS Suspect an Admin will shortly move your post to the "Silver Plate" section of the Forum.