Caldercraft Model Boat Fittings 8112RHW 12mm Ramshead blocks. Walnut.
Sold in packs of 2, these walnut ramshead blocks measure ((h) x (w) x (d)), 12mm x 7.5mm x 6.3mm.
Equivalent manufacturers part number cross references:
Caldercraft 8112RHW
Mantua 37141