From The Anvil Black Rim Lock & Cast Iron Cover

Stormguard AM3 Threshold Weatherbar Gold 1050mm. Stormguard AM3 Threshold Weatherbar Silver 1050mm. Lock Centre: 46mm. Spindle Centre: 118mm. Rim Lock Cover Size: 154mm x 116mm x 30mm. Fixing Centres: 123mm.

eBay