Thanks for your feedback! We're really glad to hear you like the weight and overall quality of the bell jigger.
We agree that having the measurement values engraved next to each line would be helpful. Unfortunately, because of the curved shape of the bell jigger, we're not able to add those markings during the manufacturing process.
That said, the measurement lines themselves should be accurate. If they don't match up with your Japanese jigger when measured, it's possible you received a defective one.
If you could reach out to us at hello@abarabove.com, we'd be happy to get a replacement sent your way. We'd love the chance to make this right.