yes, think I'd agree with you. On the CD catalogue it appears on page 46 of Book XI from 1885 with factory pattern No. 898 as you've said.
There isn't any diamond/lozenge accompanying the drawing, so the suggestion is that this is a variation on pattern 1074 possibly, which had already been Registered with the Board of Trade in April 1874. The only anomaly to this line of thought is that this pattern No. 898, with the stars, seems to have ended up with a factory No. lower in sequence that the earlier original example from 1874, which has the higher No. of 1074.
Fred may well know more about this numbering system - I do know that numbers were certainly allocated out of sequence on occasions.