Stationary, Personally I would date those mowers as so:
1) 1962-1963 Victa 506 Ambassador 4-stroke
2) 1957-1959 Victa Model 5 18" Special
3) 1956-1957 Victa Model 2 Rotomo 18"
4) 1957-1958 Victa Model 2a Rotomo 18"
5) 1967-1968 Victa 543 160cc Corvette 2
6) 1963-1964 Victa 509 Utility
I think some of the dates there are quite far off, others are much closer, or correct.
With many of them, the serial numbers on the engine can really help out, if you would like to post the serial numbser for us, we can tell you alot more about them.
