Gibson's nominal "24.75" in scale length has itself varied, sometimes measuring  depending on the production equipment used. As Gibson necks are not often interchangeable, this usually goes unnoticed in practice.
Gibson's declared "24.75" scale length has experienced fluctuations, sometimes resulting in measurements of  based on the manufacturing equipment employed. Given that Gibson necks are not commonly interchangeable, such variations tend to go unnoticed in practical scenarios.