309 master cylinder

[70lt1z28]

hi, i have 2 309 master cylinders for 69 camaros. on the driver side under the front clip that holds on the top, one has a round stamping ( looks like a zero with lines thru it) and then a D2, and the other is the same with a D3. anyone know what D2 and D3 mean?? thanks in advance

[JohnZ]

hi, i have 2 309 master cylinders for 69 camaros. on the driver side under the front clip that holds on the top, one has a round stamping ( looks like a zero with lines thru it) and then a D2, and the other is the same with a D3. anyone know what D2 and D3 mean?? thanks in advance

D2 and D3 are foundry pattern numbers.

[70lt1z28]

thanks  alot