@raduradu
24xx is referring only to 24x0 series, not any of the later 24/25x5/7/8/9 which are quite different unit series and don't use the same logo as 24xx [24x0]. 2xxx generically is understood as referring to 22x0, 23x0 & 24x0 only. This is the same referencing as used by Garmin earlier, where 2xx/2xxW is meaning only 2x0/2x0W and not including 2x5/2x5W too generally. Many logo files are the same in related model series unsurprisingly but are even shared between series in some instances. We'd expect that nuvi 2xx5 and some 2xx7 may well use the same file for example and so they do in fact just as you've noted for 2455 and 2597, however nuvi 150 has the same logo as them too.