Ajoto
No rattle twist retraction. Has a tactile indicator when the refill is fully retracted to stop from unscrewing the back too far. Feels like the o-ring hits a wider section. The back screws off all the way for the refill swap.
Variants: Huge range of metals and finishes. Stainless Steel, Brass, Ebonite, and an annual limited edition solid Sterling Silver.
Refill: Schmidt P8126/P8127/P8120 short capless rollerball. Likely also fits Parker-style G2.