Old delta faucets/shower from around 1995 -Mark

used ACE faucet stem 3S-10H/C 4200689 $11 

 DANCO homedepot $9 Replaces Delta OEM # RP1740 Compatible with Delta kitchen and bathroom lavatory faucets 

DANCO ID length 3, broach S Height: 1.94 inch Length: 1.94 inch Material: Plastic Packaging Type: Blister Pack Stem Finder ID: 3S-10H/C Width: 0.75 inch 

 DELTA RP17400 Two Handle Repair Kit - 133468 $12 

  https://www.lowes.com/pd/Danco-5-Pack-Plastic-Faucet-Stem-for-Delta/1056707  $17

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 water supply shutoff valve Stem Repair Kit     BrassCraft 215652 BCSR01 $4 

 RP4993 seat and spring

Yes in older Delta's they used a taller seat with a straight spring. That had to be somewhere in the 70's or, 80's when they switched...