Gearbox serial no questions

[Johnny B]

I have a Sportomatic gearbox that has 905 / 21 stamped on it with serial no 23954128 can anyone tell me what year and model this could be from please and confirm it is a 3 speed

I also have a 902/1 gearbox with a serial no 235805 am I correct in thinking this from a 1965 - 1967 911 or 912 and is a five speed.

Thanks in advance

[djpateman]

235805 902/1 1967 912 5 speed originally A F M S X
905/21 should have serial 7420xxx in 1972 or 7430xxx in 1973, these were 4 speed
please post me a photo of the serial #

[Johnny B]

Originally Posted by djpateman

235805 902/1 1967 912 5 speed originally A F M S X
905/21 should have serial 7420xxx in 1972 or 7430xxx in 1973, these were 4 speed
please post me a photo of the serial #

Thanks for info below is the photo of the serial no on the gearbox

[djpateman]

That "serial #" appears to be in the wrong location. I believe the serial should be to the right of the type # and between the output flanges; possibly scraped off.

[Johnny B]

Originally Posted by djpateman

That "serial #" appears to be in the wrong location. I believe the serial should be to the right of the type # and between the output flanges; possibly scraped off.

Thanks, will double check the gearbox but can't recall seeing any other no's or evidence of no's being scrapped off, appreciate the advice and help more photo's below

[djpateman]

looks like the remains of a number here where it should be located:
can you get a closer shot? should look like this:

[Johnny B]

thanks will check