Dynamo used to work until about a year ago - I've been commuting since about then and ridden a lot more.Bike with BB dynamo quite a rarity these days, wonder whether it still works? Rear wheel rim looks to be alloy. Pictures show the bike fitted with different freewheels / cassettes , one has a silver finish large sprocket the other black. Both look new! Another picture with the black shows a slack chain hinting at mech failure. Wonder if the timeline for these various repairs is longer term? Confusing... More info from the OP required!
The two pictures of the whole bike are before the service. Only the close up is afterwards. (So you can see the rear wheel was replaced too)Perhaps you have an old picture of the bike from before you had it serviced?