Paul is correct. The following is a Google translation of this page: http://kajiwara.weebly.com/takumar-13525-v2-66.html
V2 This version differs from version 1 for six details: - Weight 470g against 444g for version 1 - 35m by 30m to infinity against version 1 - The serial number is 43,812 against 43,802 for the version 1 - 8 slices against 6 for version 1 - Presence of the marking "4" on the scale of depth of field (the absence of 4 Version 1) - Serial number (see page index and prices Takumar ) Note that the optical formula has been included in K-mount: Pentax SMC 135/2.5. The Takumar (Bayonet) 135/2.5 is a low-end goal without SMC treatment not repeating this formula. Darren Addy Kearney, Nebraska -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.