Seiko has been on an absolute killing in 2020 with a range of knockout releases. For example, in March they releases a series of watches for the 55th anniversary festivities. Joining that series are these two tasty diver’s watches. Quick notes below!
The 1965 Diver’s Re-creation SLA043J1
While faithful to the 1965 design, this new Prospex diver’s watch has greatly enhanced functionality. It has a box-shaped sapphire crystal and 200m water resistance for greater reliability. The case back bears the same dolphin emblem as the 1965 original.
The watch is offered in a special box with a blue color additional strap made of silicon. This beauty is available as from November 2020

The 1970 Diver’s Modern Re-interpretation SPB183J1
The new Prospex re-creation of this 1970 diver’s watch is slightly larger than the original but faithful in every other respect to its design.
The case was given that wide and by now familiar looking flowing design to protect the crownCrown The knob on the outside of the watch that you typically use to either wind the mainspring or set the time
[Learn More] at the 4 o’clock position.

It is powered by CaliberCaliber The caliber ('movement') is the heart and engine of a watch. It consists of a number of interconnected components that work together. Energy is transmitted through the gear train, to the escapement mechanism. The escapement mechanism releases this energy in a controlled manner. This drives the gear train, which ultimately rotates the hands of the watch and keeps time. [More Info] 6R35 that delivers a power reserveRéserve de marche Also known as Power Reserve. A watch's power reserve refers to the amount of time a mechanical watch can run without being wound. The power reserve of a mechanical watch can vary depending on the size of the mainspring, the efficiency of the gear train, and the rate at which the mainspring releases energy. If a watch has a Power Reserve 'complication' it simply means that the status of the power reserve can be seen on the watch itself (either on the dial or movement side of the watch). [Learn More] of 70 hours. The case has a super-hard coating and a dual-curved sapphire crystal with anti-reflective coating and is 200 meter water resistant. Haute horlogerie detail: The upper surface of the bezel rim is ZaratsuZaratsu Polishing Zaratsu polishing is a type of polishing technique used in watchmaking, specifically for the polishing of steel components, such as the case, lugs, and bracelet. It is a process that uses a spinning circular disk with an abrasive surface. The craftsperson, holding the watch part, applies a certain level of pressure and uses a specific angle to ultimately achieve a mirror-like finish. [Learn More] polished to a perfect mirror finish.
The watch is offered in a special box with blue color additional strap made of silicon. Also available as of November 2020.
Quick question, is the bezel insert on the SPB183 stainless steel or aluminum?