Example: TAKASAGO 185 X19 4K 303
First stamp is the manufacturer Takasago, then the rim size, then a number, then a letter, then 3 numbers.
The number after the rim size is the year the rim was made. 2, 3, 4, 5 etc....197(2) 7(3) etc.
The letter denotes the month of manufacture.....A-L. Jan- Dec.
The last 3 numbers tell you if the rim is H1 or H2 or other model. The H1's are 305 rear, H2 is 303, S3 front is 308, S3 rear 307.
In this case with no 3 digit code I would venture a guess at an A series or very early H1 maybe?
1B denotes February of 1971.
215x18 so probably a front wheel.
Looks a lot like the rim I used for my h1 rear wheel.
As far as the white inside coating anyway....
