Counterweight for T-2 theodolite to Brunson 190 micrometer 1.4LBS
This special counterweight is used to balance a Wild T2 theodolite & Brunson 190 Micrometer.
Special micrometer adapter would also be needed, info found here
Note, using a Brunson 190-WG that is special cut will not require a micrometer adapter and the correct counterweight is found here.