I found the production history in an old Sprint article I have.
So I have copied it in full.
June 73 - Sprint introduced with first chassis number VA/1-DL, alloy wheels, vinyl roof, front spoiler and twin exhaust pipes fitted as standard. Overdrive and tinted glass available as an optional extra.
Autumn 73 - Automatic and laminated windscreen became available as optional extras
May 75 - Final chassis number of first series approx VA/10745-DL.
New series starts with VA/15001-DL. Overdrive and tinted glass now standard. Also fitted with side body trims, interior plastic tray around gear lever and a driver's door mirror.
Headrests now available as an option.
March 76 - Final chassis number of second series VA/18278-DL. New series starts with VA/20001-DL. Front headrests, Radio and Laminated Windscreen now standard.
Limited Slip Diff available as an optional extra.
1978 - Triplex 10-20 laminated windscreen becomes standard fitting.
September 78 - Final chassis number of third series approx VA/26896-DL. New series (1979 model) starts with VA/30001-DL.
August 79 - Original chassis number series ends in VA/31188-DL.
New VIN type chassis number system introduced for 1980 models, all Dolomites share a common series of numbers starting with 100001. New style eight-character alpha-numeric prefixes. Sprint has prefix TWTLD5AT (manual) and TWTLD3AT (auotmatic).
1980 - Twin rear fog lamps fitted.
August 80 - Dolomite production ceases. The Dolomite is a Sprint with chassis number TWTLD5AT/113504.
Notes: The chassis number prefix VA indentifies the Sprint, the Dolomite 1850 had WF.
The DL suffix indicates the body style saloon.
On a left hand drive car the suffix will be LDL.
On cars fitted with overdrive there will be a letter O after DL, automatic cars will have the letter A or the letters BW after DL.
The engine numbers are also prefixed VA but are suffixed HE (HEA on an automatic).
Production Figures for Sprint:
1973 = 5446
1974 = 4232
1975 = 3589
1976 = 4035
1977 = 2554
1978 = 1352
1979 = 1240
1980 = 493
Total sold = 22,941
Steve