FOR SALE:

An extreme RARE And HUGE Chubb DETECTOR Lock back to 1827-1877 (Google: Chubb 57St Paul's Church Yard)

Look at the pen as a scale to compare the lock, that's very large size with measurement (body only) 30X25.5CM approximately with messy weight around 7KG. All the mechanism works welll and cleaned. The detector mechanism works well which lock and unlock with no issue. No marking on key but seems to be original and old enough to say. To me, it's worth to pay for someone who can afford rather than keep on looking for some years. Please message me if you've any questions.