Protracting parallel rule by W. & S. Jones
Protracting parallel rule by W. & S. Jones, with two arms divided; engraved "W. & S. Jones no. 30 Holborn, London"
- Object Number:
- 1910-187/1
- type:
- drawing instrument
Protracting parallel rule by W. & S. Jones, with two arms divided; engraved "W. & S. Jones no. 30 Holborn, London"
Protracting parallel rule by W. & S. Jones, with two arms divided; engraved "W. & S. Jones no. 30 Holborn, London"
Part of protracting parallel rule by W. & S. Jones, with two arms divided; engraved "W. & S. Jones no. 30 Holborn, London"
Protracting parallel rule; component
Protracting parallel rule; component