Another 1973.5 911T Build Date Question

[SJN901]

I have a 1973.5 911T, non-California coupe for which I am trying to determine the build date. The door VIN sticker was gone when I bought the car, but to replace it I need a build date. The COA simply indicates "Information Not Available" for the build date.

I thought I'd post my VIN and engine number to see if anyone had anything close for build date purposes.

The VIN is 9113103426, engine number 6136080. It appears to be a late model year build. Any help would be appreciated.

[mohrgan]

My 73.5 911T has a June, 1973 build for vin#: 9113103118.

[ESully]

My 1973.5 911T CIS compliance sticker is 07/73. Serial #9113103303, engine #6135865.

[miles]

Just given a bump to a fellow member

[jc4me2]

9113103335 is 7/73 as well. Engine #6135957.

[Gumby]

9113102140 is 3/73...
when did they change over to CIS?

[Mac911]

As a data point. My 73.5 911 T is a CIS with a built date of 5/73 (9113102810)

[SJN901]

I appreciate the responses. They started the CIS cars in January, '73. The 1973 F program 911T CIS US cars were given chassis numbers 9113101501 - 9113103444. The 911E Registry shows F program cars being built until October of '73, but I don't know if T cars were on the line that late as well.

[t6dpilot]

Mac, cool. Yours was probably on the line the same time ours was. #2828 with a build date of 5/73.

[Eminence Gris]

...
when did they change over to CIS?

As well as I can figure, CIS came in somewhere around 91131001400 Then around 91131002900 they changed to the 915 with external mainshaft seal.
(Happy to be corrected on this, but it's what I've observed.) Unsure on Targa VINs...