Abu Garcia pairs an asymmetrical body design with a V-Rotor design and V-Spool design to keep the reel balanced, responsive, and compact in hand, while the Rocket Line Management system, Rocket Spool Lip Design, machined aluminum braid ready spool, and slow oscillation help anglers manage braid, mono, and fluorocarbon with smoother line flow and even line lay
There are a few Daiwa 1657's on TheBay
Taking off the rear guard exposes an opening in the gear box I strongly believe that this opening is meant to be a service port through which owner could spray the internal mechanism with grease for a quick servicing without taking it apart, and also useful to drain water out and lube if the reel got accidentally submerged in saltwater
The rod is made of a strong 24T
Unfortunately parts for this reel are next to completely unavailable
The Soron's system on the other hand is quite simple in design and works great