Following are the average effective mass ratings for the SME 3009 series.
As you can see there are quite a few versions and I did not even include the 3009 series III (very low mass).
SME 3009 Series II Improved (fixed headshell) 6.5g
SME 3009 Series II S2 Improved (detachable headshell) 9.5g
SME 3009 Series II (detachable headshell) 12.5g
SME 3009R (detachable headshell) 12.7g
The heavier 12.5g series II is often referred to as the "non-improved" for identification purposes.
As you can see there are quite a few versions and I did not even include the 3009 series III (very low mass).
SME 3009 Series II Improved (fixed headshell) 6.5g
SME 3009 Series II S2 Improved (detachable headshell) 9.5g
SME 3009 Series II (detachable headshell) 12.5g
SME 3009R (detachable headshell) 12.7g
The heavier 12.5g series II is often referred to as the "non-improved" for identification purposes.