=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Tonoura             647/021 RLR(1966) is 10.0m below Attached BM
=========================== BENCHMARK INFORMATION UPDATE ADDED  12-JUL-93 :
Tonoura             647/021 RLR(1966) is 10.0m below Attached BM
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-JUL-93 :
Low values compared to neighbours for June-September 1945 -
correct as received from authority.

