F#45.1a) Obv: The bottom line of the 1 meets the end line of the second N of BLANKENBURG to the left
ND
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F#45.1b) Obv: The bottom line of the 1 meets to the left center of the E of BLANKENBURG. Rev: Tip of the right-angled skirt collar between E and D of FRIEDRICH
ND
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F#45.1c) like b), but Tip of the right-angled skirt collar in the middle of E.