Years No Range APPROX new entrants/year
1927-32 R 35000- R 110000 15,000
1932-40 R 110000- R 217000 12,000
1940-48 R 217000- R 400000 22,000
avoid R 400000-R 500000 range
1949-59 R 500000- R 710000 20,000
1959-72 R 710000- R 910000 16,000
So prior to these there was no R prefix. So that Number would not have had the R as far as I can make out Vic.
Cheers