Cover Hobart - UK 1857 - assistance with marking

[admin]

This quite tatty cover has a hand stamp, upside down, middle top, which I have not seen before. It also shows the red "General Post Office Hobart Town" large circle hand stamp with a "Paid London" smaller stamp applied over the top of the larger marking. It appears to have been re-directed in the UK and I wonder if the unknown hand stamp is a UK marking perhaps related to the re-direction? It appears to read "S???? mark Branch" with "S.E." below - see enlarged scan, inverted for better readability, below.
Any comments very welcome.

Pete

Hobart-cover-1857.jpg (201.78 KiB) Viewed 281 times

Hobart-cover-1857-handstamp-detail.jpg (88.27 KiB) Viewed 281 times

[Colin Salt]

Pete,

My suggestion is that a pristine strike of the handstamp would read SOUTHWARK BRANCH
SE
and would have been used in London, Southwark being a borough in South East London.

Colin.

[admin]

Colin, many thanks. Looks like thats what it is.
Pete