WW1 era Royal Naval Reserve RNR Officers Padded Bullion Cap Badge

King's crown and it has a nice early feel to it, removed from cap. Thickly padded. Some some dulling bullion but generally in good condition. Circa 7.5cm wide and 6.5cm tall including black backing cloth. Central jewel below crown is red. They were worn with blue central jewels from 1920 onwards, red prior to this. Thank you to Markus for the confirmation.G193.5