Looks like a 2577 bumper from the early to mid 50s. Movement is probably a 351 or 354 or similar. There are dozens of dial variations so it’s not surprising you haven't found another similar. It looks perfectly normal to me. Arabic number dials were more prevalent in the uk market it seems, but they are seen elsewhere too. If it is from the UK market, it might have a local Dennison case. Taking the back off will tell all.
Click to expand...