“Perforated” or “Pierced Batons” (in French “bâton percé”) are man-made historical artefacts formed from deer antlers. They have been found widely distributed across Europe, and range in age from around 23K to 12K years old. They are typically 'Y' or 'T' shaped, and all feature a carefully drilled circular hole.
Their function is unknown. Theories include :
Arrow or spear-straighteners, spear throwers, fertility symbols, phallic symbols, dress fasteners, calendars etc etc.
Further reading Wikipedia
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