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Hoping for some help with translating these Chinese characters written in black ink on the sheath of a recently acquired Bugis keris, which itself seems rather old. A Chinese colleague informs me that the first word seems to be a common surname (Zhang) and that the rest may be a signature and date; however, they are unable to read the latter as it does not seem to be modern Chinese.

I've put a few of the images through an image-enhancement program to better highlight the writing.

Any help much appreciated!

Thanks.