Quote Originally Posted by Tom Gordon View Post
Ooh. It's quite heavy.

Tom, you will doubtless have this information already but here goes:

Chatwood's Patent 1865 No.778. Keyholes lined with platinum alloy as a protection against acid and heat.

List 6 Sextiple Patent price list 'if fitted with Chatwood's Patent Platinum Key-hole Plug Lock £10 extra.' (date approx.1879). This extra not mentioned in List 5 or below.