Special Handstamp for Hong Kong Exhibition Sea Travel Post and Go Stamps.

As usual Royal Mail's presence at the Hong Kong Philatelic Exhibition was confined to the Post

and Go machines and there were no special handstamps or cachets in use at the Exhibition for these stamps. 

However, the Hong Kong Maxima Philigroup, a group of collectors and producers of maximum cards has sponsored a special handstamp, not announced until today.  It shows the Hong Kong skyline, with the wording

'31st International Asian Stamp Exhibition Hong Kong, Seaview'

Royal Mail's reference number is 13685 and this can be obtained from the London Special Handstamp Centre at Mount Pleasant.  As usual for late announcements the SHC allows a period for submission of covers and cards.

I wonder what would happen if covers stamped with the Gibraltar-valued stamps was sent for postmarking?

UPDATE
I've now had time to examine the new stamps (mine from Tallents House had correct - UK - values not the Gibraltar ones), and they are of course significantly different due to the new printing process.

The first thing to note is that the surface is highly reflective, compared with the gravure-printed stamps, and the phosphor bands do not show.  In fact it looks very much as if there are no phosphor bands, but I have only looked in dim light, not in darkness.

These are two high-resolution scans showing the gravure stamps on the left, and the digital printing on the right.

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