installations. In July 1929, the Post Office approved specifications for a larger Joroleman mailbox known as the No. 2. The No. 2 mailbox, soon followed by the still-larger No. 3, could accept larger parcels and packages sent via Parcel Post; these large boxes proved particularly popular with rural mail recipients, who could order manufactured goods by mail for delivery to the farm or ranch. Recent developments Europe Sweden KopparStaden AB, a housing cooperative in Falun, Sweden, has begun to install centralized mail stations with individual letterboxes using electronically operated doors in its buildings. United Kingdom Many designs of mailboxes have been created during recent years with products suitable for both multi-occupancy residences (typically tower block private accommodation properties) and individual homes. Deliveries of mail are typically made in to the mailbox through an aperture opening (an entry hole in the mailbox), where it drops into a secured compartment. The deposited items can only be retrieved an individual using a coded key (designed to work only with that particular coded lock), or by entering a number sequence via a combination lock. Electronic locks can also be used with mailboxes but they must be used in an internal location due to their vulnerability to inclement weather in the United Kingdom. Mailboxes are commonly manufactured using zintec steel, aluminium, stainless steel or galvanised steel, and then powder coated to meet the design requirements of the mail recipient. Mailboxes can also be manufactured using materials including Cast Iron and Plastic, but these are less commonly seen in the United Kingdom. The reclamation and reuse of original Royal Mail post boxes in private homes, many stocked and sold by salvage yards, gave rise to questions from the public regarding the legal position regarding their reuse, which is the subject of expert opinion in a popular SalvoNEWS story from 2012: Private use of antique Royal Mail pillar boxes or post boxes. Mailboxes all come with an aperture opening, which allows for the potential of vandalism or theft of deposited mail, but additional items are available to help reduce this including aperture restrictors, which allow for the recipient to adjust the opening on their mailboxes and set it as they see fit. In multi-occupancy developments, mailboxes are commonly ‘banked’ into a collection of mailboxes, allowing for delivery personnel to deposited items in a single location, rather than having to travel to each individual door to deliver mail.