On further reflection I can well agree that it is tau. The attached images from R. Barbour, Greek Literary Hands show clearly (scan 3) the large upper case tau in several lines, and in scan 4 in the first and other lines a hooked version of tau. So I withdraw my suggestion of pi.
Raymond
From: Asmus Freytag (t)
Sent: Monday, January 04, 2016 7:58 PM
To: unicode_at_unicode.org
Subject: Re: Turned Capital letter L (pointing to the left, with serifs)
On 1/4/2016 10:41 AM, Michael Everson wrote:
Certainly it does look more like a very common variant of “tau” than “pi”
Variant of uppercase tau?
A./
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